How to win games?

Hi everyone, im a 3k noob, and i'd like to get some advice on how to actually win games. My favorite heroes are mirana and TA.

I'd like to give an example of one typical TA game for me, where i carry my **** team, but somehow i fail to win them game.

http://www.dotabuff.com/matches/1785697083

It would be nice if someone would spare some time to watch that game, and give me some advice.

I'm not saying im best, or that i played flawlessly.

By the looks of it you either made a mistake and died towards the end of the game when the respawn timer is way too long, or you just got ratted into oblivion by Anti Mage.

Black King Bar. You didn't get it and it cost you. Against a Leshrac CM and techies?? Come on man.

so i should've sold that bottle, and bought bkb instead? that's good advice i guess. thx

Yeah eventually bottle just isn't worth it as opposed to bigger items. No problem.