I think we need more details: do you mean TVs aren't getting worse, or are? Why? What examples do you have?

I think LG's webOS is nice - its consumer friendly, but as a developer, you can whip something up and install it on your TV easily in an afternoon. OTOH, I believe not all the APIs are documented, as some of the interfaces provided to/from Netflix/Prime Video/Dinsey+ don't appear to be possible with documented APIs, and ofc, from a hardware perspective, they are completely locked in.