Savage may not get the acclaim from WWE as Hogan, at least he didn't, he might now
, but he gets lots of acclaim from anybody who was around during his career, from wrestlers to fans to announcers. He was right there with Hogan throughout those years and then reinvented himself in the late 90's to a new audience in WCW.
There's lot of rumours about his falling out with Vince, the most widely used crazy one is that Savage slept with a very young Stephanie McMahon and took her virginity. This has never been proven and seems to be an old wives tale people like to believe because of it's luridness.
The other one is that Savage was essentially forced out of WWF because Vince thought he was past his prime. Savage then left to WCW, and took his lucrative Slim Jim sponsorship with him to WCW. This is probably more plausible.
Savage was a bit of a loose cannon, so I could believe that he would hold a grudge for a long time. It's too bad he never got one last chance on a Raw or PPV for the fans to show their appreciation.