Playing support in low ranks is hilarious but also makes me want to tear my hair out

I was playing Shaman, the cores were BS, Dusa, and WK with CM as the other support. I give BS a totally free lane, and he proceeds to build Atos and run around being useless for the entire rest of the game. The other 2 refused to get a BKB against ES, Tiny, Riki (no MKB either), and Void Spirit. We took raxes relatively early and then everyone but Dusa died at their base, she ran away but had a rapier queued up and wanted to fight more without buyback.

Mind you, this is a game that we ended up winning, there are also games like this that we lose. I am sorry, but watching the guy that you sacrificed your net worth for run around chasing a Void Spirit with Eul's and E-blade and dying, and watching the other 2 be absolutely stunlocked while you get 2-shot by the Tiny is so demotivating. Credit where it is due, CM and I tried to protect each other and our 3 idiots and we ended up laughing over Dusa getting completely stunlocked for like a minute until we showed up, but holy shit get me out of this madness.

I am not some supreme player, but I know how to farm and in general I always feel like when I give up a core position I lose control over the game after the 10-minute mark.