My daughters are quitting gymnastics this year too - after several years on the competitive team. It is definitely a weird feeling - since I am at the gym so much as well! We actually had to make some decisions this year about which sport to drop because they couldn't fit everything in - they both do figure skating, tennis and gymnastics (and skiing in the winter) and there is just no way to fit it all in next year because each sport adds more and more practice time as you move up the ranks. I really want them to continue tennis because it's a sport they can play/enjoy for the rest of their lives - so they had to pick between skating and gymnastics. they love both - but skating won in the end.
I am sorry that you are having so many problems with they coach
That's really sad because I am sure she would be enjoying it otherwise.
But maybe this can be a good opportunity to try something new!