I had a thought and went through my settings on Gboard. I turned off all of the suggestion settings except for the normal display suggestion strip one and it is a little better. Not sure this made a difference, but I turned grammar check off too. Still not as good as it used to be, but less frustrating. Worth a try?

On iOS, well, I have no words on how much I hate the autocorrect on my iPad. Even with the keyboard it tries to change everything.