The "my character wont grab the goddamn ledge" situation.

You know when you're doing that super far away jump and you're almost there, you just gotta grab the ledge and you're done. But NOPE, the stupid character decides that s/he has way too much butter on his/her hands and you'll fall, sometimes to your death.
It seems to happen quite often and as many other things, it's annoying AF, and it's a million times worse off-host.

Another thing to add to my list of bullshitness, I'm running out of space already...