As much as people know his motto(great power and what not), Spidey NEVER lives up to these words. All of the big events in his life are usually handled in an immature, high school fashion, even when the character has become an adult. He NEVER maturely deals with things, simply using the fact that he's Spider-Man as an excuse. For all his talk of relatability, he NEVER grows up.
As much as I hate how that the New 52 has a Lois and Clark who aren't married, at least there's a bit of dignity in that continuity was rebooted. One More Day(beating that horse, I know) is one of the worst things in comics, EVER. Not only does Peter respond to Aunt May being shot in a utterly immature fashion, but he gives up his marriage with Mary Jane, something supposedly so powerful and pure that Mephisto himself wanted it gone, to bring back his already frail and ailing aunt. Let's dissect this for a bit. Aunt May was severely frail and old when Peter BECAME Spider-Man, so expecting too much more "mileage" out of her is immature in and of itself. On top of that, Peter selfishly denies his dying aunt's request of "letting her go and be with Uncle Ben" so that HE can have her, content with throwing away his entire relationship with Mary Jane in the process. Of all the things that OMD is criticized for, this gets the LEAST amount of publicity. That fact alone scares me.
Not to mention the fact that that storyline insinuated that people who like escapist fiction are sorry louts and losers, or the fact that THAT isn't criticized. There's also the fact that Quesada believes that Peter became unrelatable after he started being an adult, moving out, getting married, and having a generally happy life. The sad part is, many fans seem to agree with him, which means that the louts and losers bit may actually be true. Are Spidey fans nothing but useless eaters who can't even wipe their own arses and need to be put down like dogs so as to not waste oxygen? That's what they seem to be saying about themselves.
With both Superman and Spider-Man, the marriages were criticized by writers and fans, who seemed to think that nothing could be done now with married protagonists. That says A HELL of a lot about their mindsets and how mature they are, not to mention lending more credence to the above argument.
After ALL of that, what was my point? As much of an unrelatable larger-than-life "god" as some people think Superman is, at least in that respect he's true to the name, as opposed to the utter lie that is Spider-Man, a character who for all of his talk of responsibility, stagnates in a high school mentality limbo to appease both writers and fans who will feel left behind if he goes and does something with his life.