Fumble

I'm a noob in UU but is it really that bad? Stuff like MAero and Suicune always feels like a bigger threat to me.

I don't get why. Zam has been in UU longer than OU. He's frail and even Mach punch can kill it with prior damage

tbh yeah, I can see that it's very strong and will always maintain its Sash with Magic Guard, but it's very frail physically, and priority easily deals with it.