hmmmm, sounds like you "pub stomped" to 1750 with friends, many would say your true skill level isn't around there, i would agree.
i've solo pubbed to 1800 numerous times, some tips on doing this daunting task:
- remember the 3 C's : Calm Cool and Collected.
- try to go mid every game
- stay away from hard carries such as the dark lady, chronos, flint beastwood, etc. try to play heros like valk, hag, dr repulsor.
- if you can't get mid because of a situation like you said above, then go jungle, learn to play an effective wildsoul, tempest, ophelia (not so much here), legionaire. wildsoul is imbalanced right now, master him and with just wildsoul you can solo que yourself to 1800. tempest is just imba if played right, which is being active in the sidelane giving your solo lane and mid plenty of ganks.
- got a griefer in your game? stay cool, explain he may ruin this game for you but you will surely ruin his week by RAPing him, don't threaten, just suggest.
- VOIP, be active over voice chat, encourage team mates to use it as well.
- assume leadership position, don't assume someone will step up, do it yourself.
- and this last one i can't stress enough, have fun! yeah that may sound retarded but it's true, being held hostage in a game that is clearly over by griefers? just leave.
hope this helps
