I'm sorry you've had this experience. It wouldn't hurt to try clearing your cache:
Hit HOME 5 times.
FAST FORWARD twice. (Clears cache & tv reboots itself. Be patient. It takes 1-2 minutes for the tv to go black, and come back on)
That seems to fix some problems factory reset doesn't.
Another thing you could try is factory reset, but tell it you'll setup the network later (but don't). This loads a minimal and seemingly different software (the antenna tv is very different, like it used to be before Roku messed it up). So far, this doesn't seem to fix any of the common problems resulting from Roku's untested updates. Maybe it's not that different. But, it wouldn't hurt to try it. If your tv worked again this way, you could add a $22 Firestick Lite to HDMI to stream that way (Sofabaton F2 remote to control the tv and stick).
Your tv should be under warranty still. That should make more sense. But, having your Roku tv disconnected from the internet protects it from untested updates.
"People are often amazed at how much we’ve done with the number of engineers we’ve got." (Roku CEO Anthony Wood, Austin Statesman, Oct 4, 2019). "Amazed" is one way of putting it.