This is a shame that they are losing their jobs. But I can not be surprised at all. Flutter (and Dart) really just never seemed to have a reason to exist, and have not caught any traction.
Web is the only place where we don't have an alternative and dart would be a great contender.
Android later took a lot of the learnings from Dart and applied it there. I wouldn't say Flutter was a waste, it was just deprecated because there was little advantage over native Android.