TCL TV debloater. I've tried making it as close to stock Android TV as possible without messing up too many core features of Android TV.

tcl_debloater.sh

#!/bin/bash

bloat=()

bloat+=("com.tcl.partnercustomizer") 
bloat+=("com.tcl.smartalexa") # Alexa integration for tv controls
bloat+=("com.tcl.gallery") # Gallery app
bloat+=("com.tcl.notereminder") # Notes and reminders app
bloat+=("com.google.android.videos") # Google Play Movies and TV (Doesn't get rid of homescreen recommendations)
bloat+=("com.google.android.play.games") # Google Play Games
#bloat+=("com.android.vending") # Google Play Store
bloat+=("com.tcl.MultiScreenInteraction_TV")
#bloat+=("com.tcl.tv") # Important TV elements, such as switching between HDMI and AV mode
bloat+=("com.tcl.ui_mediaCenter") # USB File explorer app
bloat+=("com.tcl.messagebox")
bloat+=("com.netflix.ninja") # Netflix TV app
#bloat+=("com.amazon.amazonvideo.livingroom")
bloat+=("tv.wuaki.apptv")
bloat+=("com.tcl.guard") # Shitty "antivirus"
bloat+=("com.tcl.tvweishi") # Homescreen service for shitty "antivirus"
bloat+=("com.tcl.t_solo")
bloat+=("com.tcl.dashboard")
bloat+=("com.tcl.tv.tclhome_master")
#bloat+=("com.google.android.tv.remote.service")
bloat+=("com.tcl.copydatatotv")
bloat+=("com.tcl.initsetup")
bloat+=("com.android.camera2")
bloat+=("com.android.messaging")
bloat+=("com.tcl.usercenter")
bloat+=("com.tcl.externaldevice.update")
bloat+=("com.tcl.useragreement")
bloat+=("com.tcl.appstatecontroller")
#bloat+=("com.tcl.micmanager") # Enables mic on TV remote
#bloat+=("com.google.android.youtube.tv")
bloat+=("com.google.android.youtube.tvmusic")
#bloat+=("com.google.android.tvlauncher") # Stock Android TV (7.0) Launcher (lightweight)
bloat+=("com.google.android.leanbacklauncher.recommendations") # "Shop" page on homescreen
#bloat+=("com.google.android.apps.tv.launcherx") # New Google TV Launcher (heavy and hated).
bloat+=("com.google.android.tvrecommendations")
bloat+=("com.google.android.marvin.talkback")
bloat+=("com.android.dreams.basic")
bloat+=("com.tcl.bi")
bloat+=("com.google.android.backdrop")
bloat+=("com.google.android.apps.mediashell")
bloat+=("com.tvos")
bloat+=("com.tcl.videoplayer")
bloat+=("com.google.android.apps.nbu.smartconnect.tv")
bloat+=("android.autoinstalls.config.tcl.device")
bloat+=("com.android.printspooler")
bloat+=("com.tcl.esticker")
#bloat+=("com.google.android.inputmethod.latin") # Gboard
# bloat+=("com.google.android.katniss") # Google Assistant overlay for TV
bloat+=("com.google.android.syncadapters.calendar")
bloat+=("com.google.android.onetimeinitializer")
bloat+=("com.google.android.partnersetup")
#bloat+=("com.google.android.gms") # Play Services
bloat+=("com.google.android.gsf")
bloat+=("com.android.providers.calendar")
bloat+=("com.tcl.keyhelp")
bloat+=("com.android.providers.contacts")
#bloat+=("com.google.android.tv.assistant") # Google Assistant
bloat+=("com.google.android.feedback")
bloat+=("com.android.providers.userdictionary")
bloat+=("com.tcl.miracast")
bloat+=("com.tcl.audioplayer")
bloat+=("com.tcl.overseasappshow")
bloat+=("com.tcl.rc.ota")
bloat+=("com.tcl.imageplayer")
bloat+=("com.tcl.pvr.pvrplayer")
bloat+=("com.tcl.appmarket2")
bloat+=("com.google.android.sss.authbridge")
#bloat+=("com.google.android.tts") # Text to speech, talks back to user
bloat+=("com.tcl.xian.StartandroidService")
bloat+=("com.tcl.versionUpdateApp")
bloat+=("com.tcl.assistant")
bloat+=("com.tcl.waterfall.overseas")
bloat+=("com.tcl.factory.view")
bloat+=("com.tcl.system.server")
bloat+=("com.google.android.tv.frameworkpackagestubs")
bloat+=("com.google.android.ext.shared")
#bloat+=("com.tcl.framework.custom") # Important TV UI elements, such as the volume controls
#bloat+=("com.google.android.permissioncontroller") # Permissions granter
#bloat+=("com.google.android.overlay.modules.permissioncontroller") # Permissions granter
#bloat+=("com.google.android.overlay.modules.permissioncontroller.forframework") # Permissions granter
bloat+=("com.google.android.overlay.modules.ext.services")
#bloat+=("com.google.android.overlay.modules.modulemetadata.forframework")
#bloat+=("com.android.location.fused") # Supports Android's location services framework
bloat+=("uk.co.freeview.mdsclient")
bloat+=("uk.co.freeview.amc_catchup")
bloat+=("com.update.appnews")
bloat+=("com.tcl.bootadservice") # Ads within tcl apps
bloat+=("uk.co.freeview.onnow")
bloat+=("au.com.stan.and")
bloat+=("uk.co.freeview.uktv")
bloat+=("uk.co.freeview.fvpconfigauth")
bloat+=("uk.co.freeview.systemdistributor")
bloat+=("uk.co.freeview.tifbridge")
bloat+=("com.linecorp.linetv")
bloat+=("uk.co.freeview.explore")
bloat+=("com.google.android.videos")
bloat+=("uk.co.freeview.bbc")
bloat+=("uk.co.freeview.ch5")
bloat+=("uk.co.freeview.itv")
bloat+=("uk.co.freeview.stv")
bloat+=("com.aos.aostv")
bloat+=("uk.co.freeview.amc_horror")
bloat+=("uk.co.freeview.ch4_vod")
bloat+=("com.graymatrix.did")

for package in "${bloat[@]}"; do
    echo "> ${package}"
	#adb shell cmd package install-existing $package  # Uncomment this to reinstall everything you uninstalled
    adb shell pm uninstall --user 0 $package  
done

adb reboot

Yeah, I learnt my lesson. I installed stock firmware as I didn't know how to reinstall uninstalled packages. Next time I will try reinstalling as you suggest. However, I don't have a production TV and a non-production one, I just have one TV with bloatware to try things on.

I don't know which packages caused issues, but google play was removed and when shutting TV off and turning it on again it started going black and flashing to launcher. It was so fast that I couldn't do a factory reset with the remote so I tried reinstalling stock. It took a while because reinstalling stock failed. I had to lower the stock version, flash twice to recover. Not nice.

After going back to latest stock, I removed these packages and things seem to be working fine, I believe they are safe to remove.

uk.co.freeview.mdsclient
uk.co.freeview.amc_catchup
uk.co.freeview.onnow
uk.co.freeview.uktv
uk.co.freeview.fvpconfigauth
uk.co.freeview.systemdistributor
uk.co.freeview.bbc_sounds
uk.co.freeview.tifbridge
uk.co.freeview.explore
uk.co.freeview.explore
uk.co.freeview.bbc
uk.co.freeview.ch5
uk.co.freeview.itv
uk.co.freeview.stv
uk.co.freeview.amc_horror
uk.co.freeview.ch4_vod
au.com.stan.and
tv.wuaki.apptv
com.tcl.messagebox
com.tcl.smartalexa
com.tcl.tv.tclhome_passive
com.tcl.MultiScreenInteraction_TV
com.tcl.guard
com.tcl.notereminder
com.tcl.tv.tclhome_master
com.tcl.usercenter
com.tcl.waterfall.overseas
com.tcl.partnercustomizer
com.amazon.amazonvideo.livingroom
com.google.android.marvin.talkback
com.google.android.tvrecommendations
com.google.android.videos
com.google.android.feedback
com.google.android.play.games
com.google.android.katniss
com.google.android.partnersetup
com.google.android.syncadapters.calendar
com.google.android.syncadapters.contacts
com.google.android.tts
com.android.printspooler
com.android.providers.calendar
com.android.providers.contacts
com.android.providers.userdictionary