AITA because I wouldn't come to my daughter's birth?

I was in a relationship with my ex for 3 years. I left her because she was disheveled, unclean, sloppy, and lazy. I couldn't take it anymore and when I left she was pregnant. It was a shock to me how much it hurt me when I found out I was going to be a father. I never expected to feel so much love and excitement for a baby I never planned for. But it was a really really stressful and upsetting time because I did not want her as the mother of my child. I was upset that I couldn't just abort her but eventually I decided that I would be the best full time dad I could be and provide the best life ever. But I was so stressed out at the idea of having to co parent this woman. After she gave birth I was so happy to have my daughter in my arms and I never expected how I would feel as a father. I decided to go to court to get full custody and it was a long process of seeing her on weekends and holidays but I got it. I know some people hate when men who were in relationships with the mother get full custody but I felt I had really good reasons and it payed off. My daughter loves me very much and we have a really good relationship, and I can rest knowing she isn't being neglected and that she is safe.<br><br>She finds me very strict and I know she will be upset when she finds out why I left her mother and why I took her away from her mother. She is only 4 right now but I know she will be very upset when she learns that I took her away from her mother and I may be seen as an asshole for this. I feel confident that I did the right thing though. I think it over everday and its the only choice I can think of that I can see myself doing.