Generally, anyone with a mental disability that impairs their social functions annoys me a lot. 

Story time: There’s this one kid in a club for an engineering challenge thing, and while I was sharing my idea with my group, he just walks over and sits on the chair about 2 inches from me and starts talking about some idea that was  still on the monitor (we were drawing out basic schematics on ms paint). We were in the verge of throwing out the idea that was originally on there, but he was suggesting an alternative to it that simply wouldn’t work. He later explained that he was kicked out of his other group because “they had too many people”(I bet it was for other reasons). Now he is on our team (sort of forced our hand because we were the only other group of 3 and all other were group of 4). We explained to him why it wouldn’t work, but we could tell he wasn’t getting it. He is making this challenge infinitely harder because now we have to explain why all his ideas won’t work and why our ideas do work(in short, the goal is to build a plane out of x materials in x weeks and have it fly the farthest. We are on a time constraint and don’t have the time to have to stop and explain everything over and over again). I’m seriously considering quitting the club because of this, as it’s taken most of the fun out of it. He also keeps doing weird things like pushing a rubber ball into our backs and saying he’s giving us a back massage (most of these issues involve him getting into our personal space). Am I the asshole for feeling this way?