well, i have been in SL for 8 months and i have learnen so much about everything there i think you just have bad luck, i found a family real fast and i wasn't even looking for it, and they and some other friends and people i meet in my time teached me to RL, to look for stuff on mp and inworld stores, to make appearances, etc... it has been very fun and helpful, and i don't think i'll ever regret the time i spend with they, is obvious you will find people who doesn't know anything, not even learn, but is the same RL, you will find airheads and you can't help them if they don't want, so complain about it seems useless and makes you look like a hater, most of your points are things you can't fix, just because is imposible, you can try help some newbies to RP or maybe make manuals, clases, etc... but just complain about it... well, you should know the next words right?
about the poseballs and furries, just let them be, look other thing, go other sim, watch other people, just look at them and hate is worst than be one of they, because at least they have their fun, and you don't because you're acting like a Grintch, just be cool and do your stuff, let people to theirs.
same with the people who spend on other people, is their problem, not yours, if you don't like, don't do it, but as in RL you can't make people change their minds, you can't do it in SL, you have to remember you're talking with persons, that exist in RL and not machines you can program to be cool, i bet you know people like that in RL and you should know puting a paper with "learn your language, study and get a job you lazy ass" it will makes nothing, right? of course. so one more time ( =_= i hate to say it so many times) stop complain about people, if you have problems with they, try teach, not hate, if you don't like something, ignore it or leave it, so, if you don't like SL just do other thing, if you like then help it to be better