I don't want to participate in my mother's favorite hobby
Why don't you want to participate in her hobby?
She's obsessed with it to a point I can't bear to watch her continue. It's boring.
You should be happy and get involved in your mom's hobbies. You should just fake that you like it to make her happy.
She ruined her interests the moment she decided to bully me into it.
I understand why that would be frustrating, but I still think you should at least feign interest. I'm sure it would make her really happy.