Relationship problems

This will be long, but thank you for any advice! I’m seriously at a cross roads & struggling hard with this decision!!

How do you know when you should keep working on your relationship? How do you know when you should just call it quits?

Sometimes I feel like I am not made for relationships & that they’ll never work out. Part of me feels like my failed relationships are my fault. I feel like I try so hard, but when I don’t get anything in return, my emotions in the relationship just turn off all of a sudden. However, then there are still parts of me that are saying to try harder, to just hold on. All 3 serious relationships I’ve been in, I hold on until I realize it’s gone too far. My first two relationships were blatantly toxic, but I didn’t realize it. Or, maybe I did, but I thought it would get better. The relationship I’m in now I don’t see as toxic. However, I’ve had some friends comment on his behavior towards me when they’re around. I don’t feel like he’s bad, but maybe it’s because I don’t think he’s as bad as my past relationships? I love him, I do. But, it’s not the same. I feel like we’re fighting over the smallest things. He blows up over nothing. He gets so mad when Taco Bell gets his order wrong. His anger isn’t directed towards me, but I think this is something so silly to get pissed over. He gets so upset that he’ll just yell, “fuck! What the fuck! Stupid fucking assholes can never get anything right. I don’t even want to fucking eat anymore. Jesus Christ.” & it just goes on for several minutes. This is just a small, recurring example. Lately, if we’re not arguing, we’re sitting in silence. We used to have sex every night. Now, we don’t for several days at a time. I feel really insecure about this. We don’t act the same around each other as we used to. Looking back, I feel like I overlooked so many things that were always there. He’s always been super closed minded about every little thing, even how I raise my own daughter from a previous relationship. He’s made comments that he would never raise his kid like that, how she is the most misbehaved child (she’s really not, she’s spirited & hard headed for sure, but she’s not extremely misbehaved.) I’ve been going back & forth between just calling it quits & still working towards getting back to how we were. We used to be best friends, laughing every night. I used to look forward to him coming home from work. That’s all changed. I feel like since I’ve started noticing the things that have always been there, but I just told myself weren’t a big deal, are now becoming a big deal to me out of nowhere. He’s not supportive, he gets extremely upset when I feel like he’s going overboard disciplining my daughter. I don’t mind if he backs me up or follows my steps in discipline, but he goes overboard at times. That causes a huge argument. I WANT to WANT to work on things & I want things to get better, but I don’t know that they will. I don’t know if I want to hold on. I kind of do, but I kind of don’t. I don’t know if that makes sense. I’ve tried to come up with things that he does that benefit us, but I draw blanks. I feel bad saying this because I’m sure there are things that he does that do benefit us, but I can’t come up with anything. He makes more money than I do, but I’ve been the only one helping out financially. He has bought groceries a couple times, but that’s it. He mainly buys snack things & microwaveable items. I like to actually cook. I don’t know where his money goes, honestly. Now, I’m struggling financially because I make 1/3 of what he makes, but I’m doing it all on my own. We agreed on what he would pay for when we moved, but it hasn’t happened. Now, my savings are almost entirely gone & he can’t save a penny to save his life. I feel like I’ve definitely answered my own question. But, when it’s time to end a relationship I get scared of being alone. Ik get scared to actually do it. I’m worried I’ll miss him & maybe that all the things I don’t see now will pop up & I might regret ending things. I don’t ant it to end, but I think I might be exhausting myself over something that won’t change. But, then I think about what if we do break up & I missed the opportunity for things to change?