Everyone sees the character they way in which they wish. There's no right answer. But here's how I respond to your concerns.
"Marriage Violated the "CORE of the CHARACTER"????
"How did it violate him as an everyman?" Pete was not an "everyman." He was never an "everyman." He was a nerd, a social outcast, "Puny Parker," a person who was always on the sidelines, not part of the "in" crowd. He was also a genius. A whiz kid whom others, save for his Aunt and Uncle, couldn't understand. He was never truly an "everyman" in that respect. He was a member of the marginalized society, the consummate outsider. And, by the way, a guy who marries a super-model/actress sure as heck isn't an "everyman."
How did it violate his sense of responsibilty and Uncle Ben's death? His sense of responsibility meant that he would never choose to marry someone and bring them in to the circle of danger he created by being Spider-Man. Many of the early stories revolved around him attempting to rid himself of his super powers so that he COULD lead a normal life (ie, get married, etc.). As long as he chose to be Spider-Man, the responsible person would never have chosen to marry and thereby bring yet another innocent person into his self-chosen circle of danger. He had to, forever, remain a man apart if he wanted to continue in his role as Spider-Man. He could, of course, have quit being Spider-Man, but he felt he had to use his power to make a difference. Sort of like a Catholic Priest--you give up a "normal" life to pursue a particular vocation of serving others. You don't get to eat your cake and have it too, as it were.
"How did it violate him as someone you can relate to and does the right thing?" Uh, he married a super model and lived in a posh apartment? Hard enough to relate to a guy who climbs walls, even harder to relate to a guy who climbs walls AND is married to a fabulously hot babe.
To me, the core character of Peter Parker was about loss and tragedy, which marriage and comparable comfort violated (unless they'd have just killed MJ off, which would have been fine by me--but Pete still would have been better off married to a "simple secretary" Beatty Brant or a "teacher" Gwen Stacy, but a model/actress? That was ridiculous). What made Pete interesting to me was that despite his super powers, his life was marked by tragedy, by loss, by disappointment. More than any "deal" with Mephisto, marriage to a model/actress went to the very core of what Pete was all about.
On the other hand, the core character of Spider-Man is about success regardless of the odds. Put the Sinister Six up against Spider-Man, and he'd find a way to win. Let Norman Osborn subvert the Avengers and put them in league with the X-men and have them go after Spider-Man and, in the end, Spidey would still find a way to overcome whatever odds might be stacked against him. He'd never quit, never give up.
To me, this dicotomy of the charater--Pete representing tragedy and loss and Spider-Man representing success, made the character interesting. When he got married to the model actress and got routinely schooled by Venom, the core of the character (both sides of it), as I perceived it, was ruined.
And as for Pete "doing the right thing"--it wasn't that he invariably DID the right thing, it's that he TRIED to do what he believed to be the right thing. Sometimes it turned out NOT to be the right thing. But he TRIED to do what he thought was right and then acknowledged his mistakes. I didn't like the Mephisto "deal," but Pete was doing what he believed was the right thing by rescuing his Aunt who died by a bullit meant for him. He sacrificed something dear to him (his marriage) to save his Aunt--that's the very definition of sacrifice, in fact. It may not have BEEN the right thing to do, but Pete was trying to do what he thought was right. He's not Clark Kent, universal do-righter. He's as human a character as comics has seen, which means he sometimes makes mistakes. What makes him "good" is that he tries, not that he's perfect.
To me, neither the clone saga nor OMD went to Pete's core. The laydown for Venom and the marriage both bothered me a good deal more. But again, reasonable people can, and do, differ about these things. I understand that. I don't expect you to agree with me, nor I with you. But I, for one, am happy Marvel is at least making an attempt to return Pete to what it was that made him interesting. I wish we could eliminate most of JMS's run, the marriage, and a lot of other things, but it's all wrapped up in the character's history now, for better or for worse. The great thing about a fictional character, is that we can interpret him how we wish-although its nice to base it in the text.