What relationships are (if you please excuse the pun) is very romanticized.
I don't care who you are. You were brought up with the idea that a real relationship is perfect magic. That special someone is worth leaving your job for, shunning your friends and family, every moment is perfect and without flaw. Her smile is your smile. His needs are your needs. Sex is fantastic. Your bodies mesh. Work lives intertwine with each other perfectly... All that movie/tv show/fairy tale bullshit we've been raised with by our very first bedtime stories.
But notice how our fairy tale stories ended with them getting together and then the convenient "They lived happily ever after". Because writing a life where two minds, spirits, and personalities perfectly meshed for all times is so much less believable than Poisoned Apples and Magical Dragons with questions three.
From the start, we all have baggage. You might look at the 'perfect' family, but then not know that it's a cover to just appear perfect. The father might be just interested in keeping up appearances and doing all this father stuff because that's what was expected from him. Or that he wanted all that praise for having the good job and the perfect family. The mother might be so stunted and worried about the father staying in her life that she will forgo everything and let him walk all over her just to be able to say she has a husband. The brother might be a brat who is so tired of being past over that he acts out to get attention, and just generally rebels. And you might be the 'baby' of the family that is always looked down upon, but tested to be brilliant so everyone has high expectations of you. And even so, the Brother was the star of their lives. Even when the Baby dropped out of school to take care of not one, but eventually both of his ailing parents.
Projection? I'm not sure I'm familiar with that term...
That scenario can make any number of people feel any number of ways. Could you believe that a person coming from that scenario would think all relationships are fake because what people project seldom reflects who they really are? You can easily believe that. Could you believe that a person coming from that scenario would think THAT IS how a woman and a man should act in the relationship? Yes. Because that's all that person knows. Could you believe that person coming from that relationship, not getting real attention or focus in his family life, would believe that no one could ever want to give him real and true attention? Yup. Could you believe that person from that relationship, not getting real attention or focus in his family life, would go around SEEKING AND TRYING TO REPLACE the attention that he never got from multiple sources? Yeah.
You'll never know how someone's early life will affect them. Even if you know the circumstances, the multiple ways it will affect any of us is as varied as dice rolls. So, while it's not 'Hard Work' in relationships, it really is about compatibility. I could find an amazing girl who is docile. Truly never wanted to do anything but what I said. And I'd suffer. Because that's not my personality. No matter how much hard work, effort, or counseling we'd go through... if it's her nature to just want to completely submit to me, she could never give me what I want for my wife.
But again, that's just speaking about my wife. If I'm young, that relationship might give me good feelings in the short time. Like I said, she's a really amazing girl. We could have a great time together in the short term just hanging out and having a really casual time. But if in the end, I'd want someone who is my equal... she couldn't give me that. No amount of hard work could change her or myself. And that will relationship will end. Not because of a lack of hard work or effort, but we just weren't meant to be.
Lastly, is eating hard work? keeping yourself clean? Healthy? Stimulated? Happy? Yes. It's one of the hardest things out there. But we don't see it like that because it's for us. And even if we sometimes don't even like us, we still care about our well being. It's the same for relationships. It might take a lot of hard work/effort. But if you care about the well being of your union, you'll not see it like that.