Hi @lcm1993
The things you put into words are not easy to read, overly long sentences with no clear focus, so some points you have may get lost to a reader. Try forming shorter, more concise sentences, it will help us understand your problem more...
I would say, I remember you from an older post where you asked if your relationship is over - from last year. It doesn't seem like a lot has changed for you guys, sorry to hear. Relationships need work, and outside factors can put a strain on people, that much is a given, we all have to navigate that. When your partnership works, it can take the occasional strain, and in the best cases, the two people in it will work for making things better. Problem is, you list a handful of problems, but does not go into what exactly you have arguments about, what doesn't work. Just expecting things to work while you literally said there is resentment towards one's partner is a bad enough sign. Being annoyed with something is one thing, resentment is a different level altogether.
It is completely and utterly unimportant what sort of grandparents your parents are - sure, you may like or dislike it, but when you decide to have a child, YOU decide to have them, not the grandparents. Expecting grandparents to help out is an extremely pitiful behaviour, I would urge you to look into yourself on that front. If grandparents help out because they want to, that is great and positive. Expecting it is rather pitiful. Especially as a man. I am speaking as one, myself - As grown men we need to be accountable for our decisions, and work on things to make them better. Not run to mum and dad, not being annoyed they don't make our lives easier. I get the hardships that you listed, but taking life's swings and making your loved ones' lives harder because of them is just weak.
Your question was - Can our relationship work out? - But we can't even ponder the question because you have said very little about the arguments, what is not working with the relationship itself. What she has done, what you have done, we have nothing of those.. Only frustration with grandparents, sister's partner, redundancy, etc.
The one thing that is there is arguments involving pushing. Now, that is physical. It is NEVER ok. We are not children, we are adults, and should be in control of our actions. Once an argument becomes physical, that is the failure of reason and common sense. When you use your hands instead of your words. And as such, based on that alone, I don't think the relationship can work.