Similarly, my Sony TV updated and now freezes when I try to watch Netflix (I have to unplug it from mains). I hate that I can't return it because it's not in warranty, but this isn't the TV breaking, it's Sony deliberately ruining it.
As long as it can show images and play sound correctly, those are really non-issues as I'm using Android TV boxes anyway. So disconnect the TV from internet and use a TV box instead, all issue resolved.