How do you know she isn’t boycotting marriage therapy becase you haven’t started individual therapy? I think you should have jumped to do whatever you can to show you are invested.
I also think she sounds like she is acting like a sore loser – boycotting therapy because she didn’t get her way.
Whichever way is the truth – she doesn’t sound like a team player. Even if she’s wrong, there’s nobody there to work with. I have a friend who did this to her husband for a year until he moved out. She wasn’t right, but she still “won” because you cannot have a marriage with one person.