Updated to WebOS 2024, now my G3 is basically unusable

Opening the TV settings by long-pressing on the button causes the whole TV to freeze up and subsequently lag for the next minute when trying to interact with it. Same happens when I exit an app and return to the homescreen.

I ignored the update since the prompt first appeared a few weeks ago, but a friend of mine just updated the TV not knowing I deliberately ignored it so far. Any advice on how to deal with this lag, or perhaps a way to revert to my previous version?