Sniper vs Alchemist is the most infuriating match as a sniper because acid spray hurts so much.
It costs you HP to get last hits, when you low he can just throw a stun your way and either get the kill or take you low.
You spend more time running then doing anything else
At slightly higher levels of Dota there is hardly any sniper picks, thank goodness. I just cringe every time we do get the odd sniper picked, and the other team responds with a PA. GG