The most annoying thing about ranked at low elo is:
- No-one wants to play tank.
- No-one wants to play champions with reliable CC.
- No-one wants to take traditional mid lane mages for teamfights.
- No-one is ok with getting an assist and not a kill.
- No-one wants to learn the good and bad matchups of their lane
- No-one wants to ward or buy sightstone
- No-one considers the needs of their team when fighting (peeling for squishies, etc).
- No-one is willing to accept they need to improve and would rather blame somebody else.
- No-one actually cares about objectives, kills are most important.
- No-one actually realises this is League of Legends, not Call of fu*king Duty.
Yes, this definitely does not apply to everyone. But unfortunately these 10 points explain why low elo is just so terrible and why the meta is so annoying. Champions like Master Yi and Vayne are played a lot because champions like this thrive on the inability of teams not being able to work together, of people feeding from bad mistake after bad mistake, and bad team comps.
At this level, your best bet is to find the middle ground, the champion that can potentially carry in 1v1's but also have a place in teamfights. I myself like playing Orianna, but sometimes I really regret it when I get jumped on by the fed assassin, or whatever. For these cases, I would play Ahri, not useless against assassins, can be played aggressively and safely, has a very good time early against immobile picks that will come your way, but can also wait out a bad early game for decent late game. Plus, a really nice piece of CC that can easily punish a dive or misplacement, in lane or in late game fights. I can't say much for other lanes, but I'm sure that there are champs in every role that, with a little skill, have the potential to carry more reliably.
Besides good champion selection, obviously practice with maximizing your warding potential (placing more as well as placing them in better spots), map awareness (knowing when you're safe to trade or when you seriously need to back off), as well as general knowledge regarding the strengths and weaknesses of the champions you regularly face (the best way to learn being to learn how to play those champs yourself).