Many people don't know him and always stack bombs in the same place. Once the opposing team gets gem, the techies player usually doesn't know what to do.
DotA 2: Chen/Visage.
There's a reason why they are the least played heroes. People don't know how to micro. If players would randomly choose these heroes more often for whatever reason, I'm 100% sure the winrate in pubs would drop tremendously.
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