It usually takes me less than 1 minute to notice if my Carry is a frustrated Supportplayer or not.
Very often, if my Carry picks Void, Phantom Assassin, Jugger for Carry, he is 100% a support in a 3 game losing streak.
From this day and until the day I'm alive, I will never play position 5 again.
Pos 1 is my calling.
I won't be there for you.
I won't pressure the enemy pos 4 @ 1:30 so that I'm able to stack, I'll hit creeps
I won't smoke us in base, put up nice wards before enemies arrive, I'll be afk till the waves meet and tp to lane
I will ping tangoes, even if I have 4 left
I will TP to mid to farm there, when my mid is ganking, f**k his farm
I will ping my support minute 6:00 to buy me ward and salve
I will use gates to farm enemy jungle, when they hit tier 3 towers minute 20
I will farm stacked ancients from my Bristle/Sven/Tide/Axe
If you are chainstunned, I will watch u die and chat 'N00B L2P'
I will be trading my life for nothing, but your's for sure, even for a lasthit
I will tell you to go to the wisdom rune, and die solo on lane and then proceed screaming in voice chat 'Where Support??'
I will eat lotuses even full HP/Mana
If the lane doesn't go well, I will blame you, not my terrible last hitting Skills or my incompetent lane equlibrium-techniques
I will buy Midas Battlefury every game
I will be playing jungle for 40 Minutes
I will call out my supports for everything that goes wrong and ping you when you die
I won't be there for you
If you throw games, I will report you again and leave you comments on your steam profile
I will take my frustrations into the next game and punish you for something my previous teammate did
Alone I will be carrying my Baboon Teammates!
Source: https://www.reddit.com/r/DotA2/comments/17ytpgz/switching_from_pos5_to_pos1_i_will_become_the/