A couple of months ago I started my Marie Sklodowska-Curie Individual Fellowship. My relationship with the supervisor is pretty bad, which is surprising to me as she was involved and seemed to respect me when preparing the actual proposal a year ago.
She does not respect me, and sends me very unprofessional audio messages accusing me of not being 'wired for research', seems to think I should be available at all times for her and whenever we meet up. She is always late, at least 45 minutes late, every time without prior notice and never apologises. She is very condescending to me and it is getting to the point where I am starting to doubt myself and my research abilities. She always points out my flaws and there have been a couple of incidents where she's blown out at me and yelled. Whenever I have tried to fight my corner, I was met with "there is a hierarchy and you need to be aware of it and respect it"-kind of answer, which was extremely insulting. It is getting very toxic and since I do not want to quit the program, I am starting to consider the possibility of changing supervisor.
I wondered if anyone had any similar experience of changing supervisor and could tell me how easy/difficult it is to get it approved by the the European Commission.
Update Oct 2022
It ended up with me reporting my supervisor to the Student's Protection Board at my University for bullying and harassment. My supervisor also wanted to leave the supervision because she could see I was not backing down. From there they advised to tell the European Commission the supervisor was stepping down due to personal issues. I have another supervisor now but she is still employed as a Full Professor at the University, which stings but at least I don't have to put up with her constant belittling. EC asked no questions and I'd say changing supervisor was fairly easy.