I went with WebOS, so far the best of them, meaning the less painfull one.
Nothing a well-configured pihole can't handle, but when I found out a $1700 TV is that awful I was livid.
It has become really hard to get a proper dumb TV, if they aren't using the well known OSes, they bundle some custom firmware that also pretends to be smart anyway, most likely using some FOSS POSIX OS.