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Pro midlaner

Here, so you know that dota consist of 2 supportive heroes. Not just one.
https://www.liquiddota.com/forum/dota-2-strategy/454943-dota-1-to-5-system
Blaming solo support who is not feeding when there are 3 core heroes feeding in the team is not the right thing to do.
You want to win? Pick 2 supports. Simple