Mate, I read the whole thing. The only claim I saw as to why voting is counter productive is that "voting convinces people that they've done all they need to" idea, which I think is flawed. All the other arguments are talking about voting having low impact and it can't fundamentally change things.
Please, if there is another part that I missed, tell me what it is, whether that's something backing up the complacency claim or another claim entirely. I'd love to be proven wrong here.