Argument is a normal thing in a relationship because there is no perfect relationship and can never be a relationship without arguements and misunderstandings.
When couples or lovers have misunderstandings ,the way they control or handle it and move on determines the intensity of love they both have for each other. When lovers or couples argue, they are just trying to clarify some facts. But if the arguments lead to a fight then that is not good.
I argue with my girl and some times we have misunderstanding, but that does not mean we would break up for that. We learn from our mistakes most times when we argue and we also discover that one or both of us does not repeat that mistake just because of the fact that we argued.
I am a very loving and peaceful person, so if I happen to have a misunderstanding with my lover or we are involved in an arguement, we both make ourselves to see the reason why we are arguing.
It's just a normal thing for couples or lovers to argue, but every lover or couple should try to avoid an argument leading to a fight and they should also try to make peace after arguing.
Arguing, in and of itself, is not a problem for a relationship. If your arguments devolve into the physical, or name calling & trash talking, or if you hold onto the argument for days, weeks, months, etc. then it's a sign that your relationship isn't working (more specifically, it's a sign YOU are not ready for a serious relationship). And, quite frankly, if you've been in a 2 year relationship where 90% of it is arguing, and you feel so strongly that arguing is unhealthy and bad, then I'd say you're seriously immature & disfunctional. Get out of that "relationship" and seek counseling, because it appears you thrive on conflict.