Despite my MMR, I'm not retarded. And that's what annoys me, is that everyone wants to offer advice tailored to someone who doesn't get basic fundamentals. There's a serious misunderstanding about what's going on at this MMR.
Just to cherry pick from my last 10 matches, I can farm just fine. Losses include Slark (468 GPM), Axe (520 GPM), Axe (545 GPM), Sven (536 GPM), and Dark Seer (430 GPM). You know how fucking ridiculous the game has to be to lose as a carry with over 500 GPM? You literally can't carry a team solo. I know people think you can, but you can't. Maybe someone who's really a 4k player can, but someone who's a 2k player cannot.
The Slark loss had a Luna with brown boots, and Agh's up until 38 minutes.
The 1st Axe game had a Jugg with phase boots, PMS, and MoM in 33 minutes.
The 2nd Axe game I think was just poor teamplay. This is one where I'm not upset we lost.
Sven loss was just players who were shit at their carries. Ursa, Zeus, and Axe and they never really got kills (with an Omni to back them up, too).
The Dark Seer game had a guy who wanted to play carry Omni, and then another who wanted carry CM. The CM got pissed and started feeding about 15 minutes in. I actually think he was a smurf (he dominated the shit out of his lane) who was just trolling.