When I used to ride "alot" of coasters, the top "never agains" were:
1-Vortex, King's Island
2-Dragon, Adventureland (the horsecollars are the worse, and the loops have a zig-zag at the top!)
3-Tornado, Amarillo, TX, another OD Hopkins masterpiece. No OTSR, but really nasty shaped loops and pull outs that literally cracked my back (in a BAD way).
4-Steel Phantom, almost worse every time. I rode it at Coaster Con when it opened in what seemed to be a break free ride. It went so FAST thru the loops you were stuck to the seat and didn't move an inch. Anyone member this? Then later, with breaks on, it gave plenty of time for headband city. SO happy they're re-doing this ride.
5-Z-force. Rode once at Great America, once in Atlanta and once at Magic Mountain. Got worse every time. ouch!
UNTIL I rode Viper at SFGAdventure. Whatta nightmare! I thought my jaw was broken. AND Mr. Freeze in St. Louis is a cool ride, but it did make me bite out a large chunk outta the inside of my mouth. Spit blood the whole way down the exit ramp. yowza!
And whoever said the T-Bolt at Kennywood is rough, where?? It's a wild woodie! One of the best! Maybe you had a bad wheel.