Actually a lot of stuff:
Converse classic leather, every vans I skated sk8 hi, Kyle walker and classics...both brands are too thin.
Forged baseplates in general, they're too stiff and for rough grounds are a big no no, I had thunder 147 lights.
Tensor mag light, they're not durable at all too fragile.
Krux trucks are too damn hi and I couldn't make them turn like I want.
Oj 101a ez edge, they wear too fast.
Oj 99a insanethane hardline, they don't slide, no matter what.
Pointy and short noses and tails.
Real full's humongous wb.
Andale bearings and bones reds, I broke them too easily.
Jessup, too slippery.
Philips bolts.
I think that's enough hahahaha