Edit: Oh and his buddy who laned with me, stood up for him saying my farm was shit and I was slow. Good thing bro code doesn't let your friend know that he single handedly lost us that game and maybe give future tips on how to give a game away.
Friends will always defend their friends, and no one will ever admit they are wrong about anything. As true in Dota as it is anywhere. You can actually sniff out a 3-4 stack pretty well when someone's argument gets so retarded and tenuous and confidently-stated that they must know they have the backing of the majority of the team.
I had a game the other night where the 2nd and 4th player had really similar names, so I knew it was at least a three stack. I didn't want to get stuck playing support for some giant stack, so I quickly called mid and picked Zeus (this was Least Played mode). The four others proceeded to pick Pudge, Death Prophet, Weaver, and Void. Nice synergy boys. The Pudge (I wasn't sure if he was stacked with the other three) tried to go mid, I said, hey man, I called mid immediately at character select, and he went top.
I did fine, didn't gank quite as much as I should've, because a) others kept fucking with the courier when I tried to bottle crow b) the lanes were always pushed badly for us and c) I probably spammed my Q too much last hitting, but whatever, I got my bottle, boots, and ult up quickly, was involved in 8 of the 9 kills our team got, and did 15k damage while the rest of the team did 17k total. I was 2-3-6 and we lost 28-9. As the game gets out of control, the Pudge (who is about 0-8-1 at this point) asks me why I wanted to play mid, and I said because I picked Zeus and Zeus is a mid hero. The Death Prophet chimes in that I did nothing with it, I say, look, I don't want to get into it with you guys (hadn't really said anything other than helpful info like MIA calls and shit), I did what I could this game. The DP is like "No hero is purely a mid hero." I say, "You guys are a four stack, right? At least let me know what I'm arguing against. " And it's just silence. The Pudge starts making more snide comments later, I look at his profile and see that Drow Ranger is his most played hero. I really wish I had looked him up on Dotabuff during the game:
https://dotabuff.com/players/50077794/heroes
1/3rd of his games are with Drow Ranger and he has 63% winrate, then he has a bunch of games on Spirit Breaker (another pubstomper) at 66%, and his winrate on virtually all other heroes is horrible and he's overall at 8 games under .500. He's 0-6 lifetime on Pudge.
"Hey Pudge, maybe you should go back to Drow Ranger bro." Recite his stats to him. Spell out in plain English how far out of his league he is and how bloated his MMR is from playing one ezmode OP hero over and over. "Least Played mode is not for you." Deep down his friends would've known I was speaking some truth. If only I had checked Dotabuff!
Anyway, mostly just a rant here, but you're never going to win an argument in a Dota game. It doesn't matter how wrong they are, they're not going to change their mind even a tiny bit.