Does this make me a bad “stepmom”? I just need to vent.

When I met my boyfriend he didn’t have full custody of his kids. 7 and 4 year old. (No it’s not something horrible) well within the year we got together we had gotten pregnant. I also at that time had not met his kids yet (crazy baby mama wouldn’t let me be around) I’m 24 and went from 0 kids to a newborn and 2 kids that don’t respect me or listen to me. I love my boyfriend beyond words and I always treat those kids amazingly but sometimes I wish I had my old life back. I know you can’t take it back (I went into this relationship knowing he had kids) I understand that. But I just sometimes don’t think I can’t handle it and didn’t realize how mentally exhausting it can be.