I like my Vizio tv, it’s pretty great but the “features” in it suck and yeah it runs like dogshit in the menus.
I use an appleTV as my source and couldn’t imagine trying to use their smart stuff.
My “budget black Friday basement Samsung TV” is … probably as good as the Vizio but “lacking features” that I otherwise have turned off on my Vizio.
The best part about my Samsung relative to the Vizio is the Samsung turns on without issue whereas the Vizio sometimes seems to take forever to wake up. This might be an energy saving feature of the Vizio vs Samsung but it’s annoying.
Vizio is fantastic if you’re using your own source, I wouldn’t rely on their smart stuff though.