Unpleasant situation with a collaborator made worse by supervisor. Am I overreacting?
I think that how it plays out in the future depends on you and on your relationship with your advisor, so protect that relationship carefully. 

You seem to be frustrated and speaking from that frustration only. This isn't, generally, a path to success. 

It also reads as if your advisor "blamed" you for ending the collaboration just as a way to save face. This is a sign of weakness, of course, but not necessarily ill intent. 

Find your own path, but make sure that your advisor supports what you do and is happy to support your next steps with recommendations, etc. 

After you finish the degree it is unlikely that anyone will remember what is happening here for very long, unless you act in a way that makes it memorable. I recommend against that.