I think the problem comes because people operate behind facades. They aren't honest as to who they are during courtship. When, once the person feels safe in marriage, they change. FALSE ADVERTISING

That is when resentment takes hold. This takes the whole meaning of courtship and throws it out the window.
A person should do what they love doing...their passion. When you meet a person of the same interests and passions...you can talk soul to soul, and so, a soul mate is found. A frequent tactic employed by both sexes is to hang out at locations, not of their interest, and attempt to hook someone (Yes...as in fooling someone until it is too late...they wait until you bite and they reel you in like a fish). They align themselves with a person who often is not a good match...they sabotage themselves from the start...and cheat the other in the process.
People don't test enough during courtship...yes, that means part of the blame goes to you. Since people control their actions during courtship, you cannot reliably look at actions...However, you can test reactions. They are, by far, the more difficult to control. Arguments will happen in marriage...especially when your partner refuses to see how right you are...sorry, we aren't talking about me here...

...the goal isn't to see if they argue...but to see if they argue fairly. A person who holds grudges...ugh...or a person who is stubborn, is not a mature person...not one a person would want to walk through life with. Now, when I say stubborn...I certainly don't mean someone who, when they don't believe they are wrong because no compelling evidence was put forth to change their mind...doesn't. That is a truly thinking person. However, when there is compelling evidence that defeats their argument and they refuse to yield because they simply cannot admit they are wrong...there is a whole lot of fighting that is going to be happening...unless you suppress your personality...and if that happens, you shall simply exist and not live life.
A major part of life will involves being with other persons (if you so choose, of course). Choosing, correctly, who you surround yourself in life with, is one of the most important choices you can make.
Your thoughts or experiences?