the sniper from team fortress 2, from the perspective of a medic main
you can't defend
you can't hide, not for too long
you have to keep moving, and you have to move erratically
you might get a couple seconds in their line of sight
if you use the vacc (which can give you bullet resistance every so often), a demoknight might charge through your team and one-shot you with a melee crit just because they saw you with it (since the vacc can be considered annoying to play against, but does not protect against melee damage)
sniper is an ever-present threat, even in areas you think you're safe, like inside the spawn building
no one can outsmart bullet
most of tf2 is fun even when you're losing, but this is why i don't really play tf2 anymore.
i want to see what's going on because knowing what's going on is fun, but i need to stay behind cover. even if i stay behind cover most of the time, i need to step into a sightline at some point, and then poof. it's impossible to play against a fast/accurate sniper.
if i get killed by any other class, i feel like it was my fault in some way. you can duck. you can damage-surf. you can watch the flank routes. you have a saw and a crossbow, if you're feeling spicy. but sniper? you can't react. while strategies exist to reduce risk, it's just an inevitability.