I think a lot of the complaints revolve around wrestlers who're pushed, being pushed, about to be pushed or whatever whereas some fans prefer someone else. Maybe they're just not fans of the guys being pushed or who've become big stars and thought that there were superior choices to be made. As a result of those "superior choices" not being made, some fans have to have a reason for that to happen and all these big conspiracy theories pop up and/or accusations of backstage politics or the age old "they don't know what they're doing" criticisms. For instance, I remember some posters on these boards felt that Shelton Benjamin should be given a major push. Their reasoning: he's such a great athlete. While certainly true, he also had the personality of dry grass who couldn't get fans to invest in him and it's not as though he didn't get opportunities. He had a couple of long, significant mid-card title runs, he scored wins over Triple H, RVD, Chris Jericho and some others. Benjamin was good mid-card/tag team wrestler in WWE that some felt would be a main eventer once he left. Well, Benjamin has been working primarily for ROH and New Japan since late 2010 and where's he been? Exactly where he was in WWE: in the mid-card/tag team picture.
I think that Triple H is a good example of someone that's made it as a major star who also gets a good deal of hate from a fair number of internet fans. Now someone, somewhere, somehow at any given time is going to draw the ire of some internet fans because every wrestler is going to have his or her detractors. However, Triple H is someone that's been very frequently harped on for the past 15 years or so. Triple H is criticized for his association with The Kliq back in the day, he's been accused of only being a big name because of his relationship with Stephanie McMahon, that he has an overblown ego, etc.
It's true that Triple H was part of The Kliq and that he's played politics. However, a lot of anti Triple H fans conveniently forget that their all time favorites like Hulk Hogan or Ric Flair did the same thing and played backstage politics on a whole other level. Hence, you've got something of a double standard because Flair & Hogan being childhood favorites somehow makes it different.
It's true that Triple H played politics, but so has almost every major player in pro wrestling history at some point or another. Flair, Hogan, Savage, Austin, Rock, Cena, Triple H, HBK, Hall, Nash, Hart, Taker, etc. have all played the game of politics backstage as a means of advancing their own careers at the expense of others.
As for Trips only being a big star because of his relationship with Stephanie, it just doesn't hold water I'm afraid. Nepotism might open a couple of doors here and there, but it's ultimately going to have to be ability that determines how big of a star you're gonna be. In TNA within the past few years, we saw Brooke Hogan & Garett Bischoff put into some fairly high profile spots and what happened? They crashed and burned because they had no talent. If Triple H didn't make money, if he didn't have the majority of fans interested in what he was into, if they weren't into his matches, if they just weren't invested in him, then he wouldn't been one of the top guys in WWE since the very, very early 2000s.