I had a Southern Tier Pumpking, and thought it was one of the worst beers I have ever tasted. It didn't smell or taste like a pumpkin beer, and instead had some sort of stale spice taste (maybe clove). I gave it to my wife who also thought it was totally gross. I really wonder if I got a bad bottle, because I have heard so many good things. But I am not sure I want to spend another $7 to find out. . .
Anyone reviewing a pumpkin beer is judging it against other pumpkins. I.e., the Weyerbacher is an excellent pumpkin beer, but very mediocre compared to all beer styles (IMO). I would get one for sipping during the holidays, but I'm not downing them while mowing the lawn.
Maybe you just don't like pumpkin beer. And yes, most or all pumpkin beers taste mostly like pie spices (cinnamon, allspice, clove) and not like pumpkin.