He aint by himself. Hes had decent support. Not all at once but through the last 3-4 seasons Dwights had:
Thats pretty solid supporting rotation of players
Well let's look at it more closely:
Hedo was great in his first run with Orlando, especially when Jameer was out and he pretty much became point-forward, but he hasn't been nearly as good since going back.
Jameer Nelson? The PG who seems to play like anything but a PG? Sure, he can create when he wants to, but he looks to score way too often and forces a ton of stuff. He's decent, but definitely not the best teammate to compliment Dwight. Jameer and Hedo have had problems on the court for a long time as well; they just don't work together for some reason.
Vince Carter was always whack. Completely disappeared against Boston in the post-season, refused to take over when needed (which is the only reason they traded for him), and his shooting was terrible. He should've been the ideal fit, but he just didn't work out.
Rashard Lewis is another guy who was money for them until the '09 Finals, but really fell off afterwards. He was capable of so much more on the court, but he became almost primarily a jumpshooter by the end of his time in Orlando.
Gilbert Arenas is not the same Gilbert Arenas pre-knee issues. Not even close. He's a shell of himself and can't dominate like he used to. His shooting, which was his best skill, has become shaky to say the least. He's not a lock to make wide open triples anymore. He can't drive, has a tougher time finishing inside, has a shakier jumpshot, and his confidence is just at an all-time low. For a guy that was once Agent Zero and tearing whole teams up with his scoring, he's had the worst fall from grace.
JJ Redick is a shooter, Jason Richardson became a jumpshooter after going to Orlando as well, Trevor Ariza wouldn't get any PT and was nothing really special until coming to LA and improving in damn near everything. Arroyo is nothing special, Pietrus became a shooter instead of slashing and bringing great man defense. He really regressed after than '09 run to the Finals.
Gortat is solid, always has been, but he was the backup C. He wasn't going to be providing much help for Dwight on the court at the same time.
Oh, and aside from Gortat, no one else on the Magic wants to play defense of any kind. Ever. Pietrus used to be really good on that end, and was solid in Golden State as well, but he's become a jumpshooter and has fallen out of favor with SVG. Hell, seemingly everyone that comes to Orlando becomes a jumpshooter.
What Dwight needs is a legitimate teammate that can take the pressure off of him both on defense and offense. There isn't a single guy on that team willing to step up in the clutch or make that big defensive stop at the end. Hell, just give him a slasher like Iguodala capable of creating for others and let them loose. They'd probably do much better. Fill in the holes at positions with able-bodied defenders capable of hitting shots and you've got yourselves a damn good team. He just needs one above-average to elite perimeter player and a cast of guys who won't let their guy get by them every single time to really make noise in the postseason.
Orlando got it done through terrific team play in '09, but they haven't had anywhere near the same level of play since then. Dwight Howard is the only reason they've been relevant. Take Dwight off the team and swap him with any other center and Orlando is suddenly fighting to make the playoffs.