The community got bad after Big Bang when a lot of loyal social players left and the new generation of little kiddies came into our lives. It's almost like you want to ask: "Why even play the game if you want to solo/be left alone?" It's an MMORPG not a Single Player game.
If you they want to play this as a Single Player game, then go make an "illegal" version or something, at least that way you'd be the only one on it and experience no lag period.
It can't be helped, most kids on MapleStory don't know what the meaning of MMO's are because it's either their first MMO, or they're just anti-social like me IRL, except I'd actually respond try to be talkative/respectful if someone asks me a question or needs help, unless they're rude to me.
So basically, yes over half (maybe more) of the GMS Community is disrespectful, but there are still a handful of really nice people. A friend an I met someone the other day in Gold Beach who was Lv.200+ and randomly invited us to a party and gave us HS while asking for fame in return, I told them to not bother faming me back since it wasn't that important, but yeah they were nice enough to stick around til we left for Riena Strait.
This was in Reboot btw, the one World you'd probably think has the most rude people since everyone would be fighting over EXP since it's technically 2X all the time, and Mesos Farming.