Anyone's inflexibility in general.
But I'd have to be pretty anal to not have at least made some peace with that by now, so the only other thing really are the people in those that seem to be online exclusively just to waste other people's time. Anyone trolls I guess.
I'm not some serious only tourney guy or something. Playing with items revved all the way up is fine by me. Making the item selection particularly questionable like bombs only is actually ok by me most of the time. Being a little random is fine too. Anything really, even if someone fights in an extremely annoying manner...but is still fighting. But I didn't get this game or decide at times to pass some time by playing it just to watch some jerkoff amuse himself at others' expense by doing stuff like running away all day, or doing nothing but taunting. Yeah yeah fun fun, whatever it's boring. If someone else wants to do that it's their deal, but I'm quitting the moment I come across a fight where there's one or two of these people, or at most giving it a round. If I wanted to waste my time watching someone do nothing in amusing ways I'd go to youtube. Or actually do nothing and take a nap or something. I'm playing a video game to actually play it.