I’ve been on a Chinese phone for 18 months now (bombproof Black view BV6000).
There’s been no big disasters or problems in that time and there’s not really much difference in operating systems between it and previous Samsung Galaxy phones I’ve had.
Mini carlosg mk2 has had an Umidigi Diamond X for 12 months and apart from the cameras being a bit meh is happy with it, Mrscarlosg had a Vernee Thor and hated it as it appeared to have a mind of its own.
Two OK phones out of three , just do plenty of research to make sure you’re getting what you need.