Sounds nuts but have you ever considered taking a break and tinkering with another musical instrument for a while? Maybe you just need something fresh to revitalize your passion.
If I was really that uncomfortable, then I'd leave.
That being said, have you tried raising these issues with them in a calm, reasonable way? They may be open to suggestion and if not, at least you tried.
We know a bassist who bought a squire for his wife ten-fifteen years ago but she never played it, and so it just hung on his wall gathering dust until I came along :D