I 100% agree. Can't tell you how many TV's I've owned from companies that suddenly have bugs because of some firmware update that they then never go back and fix because they've moved on to their next gen model which is also buggy. I've bought like 15 TCL, Hisense, Samsung, Vizio displays in last 5 years or so which is because I kept moving and sell my wall mounted sets to buyers for a good recovery price. TCL in particular has been VERY bad about this. Time will tell with HiSense, but I might leave them offline.
I want zero "Smart TV" BS that runs on some tacked on underpowered low power chip inside the TV. I just want solid optimized display tech and nothing else. I hate there's not a market for this but I understand most people don't want any additional boxes, wires, etc because they're after this clean modern art gallery look(which is silly imho).