I can't believe it took me 2k hours to realise, but sniper sure has a lot of items to completely shut down his counters, doesn't he?
He has the razorback to negate backstabs.
He has the jarate+bushwacka to negate close range
He has the darwin's to negate flares
He has the cozy camper to negate chip damage

It feels like when it comes to other classes, their unlockables are either gimmicks or different, yet viable playstyles
With the sniper it's just "here have this to completely shut down this thing that is supposed to at least bother you"