Why am I 15M not enough for my Gf 15F

**TL;DR;** : What can I do to make her love me the way she used to ?

I have been dating my girlfriend for about 4 months and for reference this has been my longest relationship but I have had experience before. She is an absolutely amazing girl but she had her issues, her ex was a complete asshoke who ruined her life. Now that ofcourse has had an impact on her because they dated for about 11 months and he changed her life (for the worse), and I understand and sympathize for her and I have adapted my attachment style to fit her needs. She can be very avoidant as the last relationship let openness become vulnerability and it try to foster a relationship where she can feel comfortable to be close and committed. I have put my 100% into her and our relationship and now I feel I have been sacrificing too much of myself, there is a balance which I have to ask is there something I need to change or something she could change. I’m ALWAYS the person changing, reassuring and giving actual gestures of love e.g I made a 15 slide PowerPoint for our 3 month anniversary and I didn’t even get a thank you. Now her parents are super strict after the situation with her ex and we have not been able to see eachother irl much meaning that communication must be done through texts and calls and the trend of communication has dropped bit by bit, 1st month Calls everyday and constant texting, 2nd Calls one every 2 days ish and constant texting, 3rd Rarley call and text every other day, 4th only called once and I have to force the start of every conversation about how her day was etc and it’s all small talk, not like how it was. She used to give reassurance that I’m the guy she has needed and that my effort my kindness and my commitment has been a blessing but her actions show no effort back and I’m an anxious attachment person so I constantly question if I’m enough and recently the lack of communication makes me feel so so so shitty and I’m seriously thinking of ending the relationship and what’s holding me back is the promises and oaths I made to her aswell as my immense love and my want for her to be the one, but clearly her ex is the only thing that matters to her. Am I the asshole for feeling this way