Hi
@HeartOfChaos sorry you are going through this.
Let me offer you a different (female) perspective. Whilst I was born and bred in the West, I come from a conservative background (whilst not Turkish myself I know such cultures well).
I don't think you are getting the full story from the girl here but not as a result of any malice on her part.
- most girls, even from non conservative backgrounds have some sort of 'timeline' in their minds (marriage, kids, house by X age). Of course life invariably works out how we want but given her age, I wonder whether she wanted to settle down and couple that with her culture and pressure from her parents ("you're turning 30 in two years, you should be married, when I was your age I had X kids")
- regardless of how western and liberal a girl or her family is, religious/cultural programming is still big, hence why her mum was not happy about the yoga activity. There is the element of thinking in her head, is this guy for me long term (if she wants marriage and kids etc) and if you aren't compatible re beliefs/religion wise then that's a big black mark against your name (e.g. we are different religions/he is not Christian/Muslim etc so I can't be with him long term). Perhaps that's why she said to you what apps are you on etc/was not sure if you were exclusive/said you could do better/she is worthless - is that all a cover for the real reason which is ultimately deep incompatibility for a LTR?
- the above can tie in with what your friends say about a guy, e.g if he's not serious/you don't want to marry him, why are you with him etc. Signs a guy is serious about you (from a female perspective) - he tells you he wants to be exclusive (I know that goes against guy game here which is for the girl to push for exclusivity), he meets your friends, wants to meet your family (don't know if you asked for this) and vice versa, essentially he invests in you by taking ACTION and by the same token she invests in you (ain't nobody got time for playing games - we aren't in school anymore, both parties invest to move the relationship forward in a healthy manner - relationship game is a different skill set to pick up). Note however if she didn't see a long term future with you, she may actively not allow you to do some of these things (like meet family).
- even putting the above aside, why would anyone (girl or guy) want to be with someone who has low self esteem. Ultimately it comes down to self respect, do you respect yourself to not put up with this. Like attracts like. Life does not stop over 1 guy or 1 girl - there's plenty of people out there that could be a better fit. So why would you even try to get back together with her? If I was her friend I would be advising her to cut contact and move on and work on herself and her insecurities/issues and become better - which is the same thing I would say to a guy friend if he was in this situation.
This is all to say that I think you are trying to win a losing battle here - she's made up her her mind.