I'm not really sure about the motive of "Q", and I don't care if he is really just trolling or not. In the big picture I think the existence of "Q" is helpful in that it's helped a lot of people understand how deep the rabbit hole really goes.
If "Q" is an enemy psyop, it's a backfired one. Millions more people now understand we're dealing with a Satanic power cult that eats children - a concept that would have been too ludicrous to propose, and considered the most extreme of hyperbole, just a few years ago.
The problem with Q is that it lulled people into a false sense of security. Mueller has been given unprecedented, almost inconceivable power, and the mandate to destroy Trump. While his mission continues apace—absolutely destroying the lives of Trump supporters and associates along the way—Qers are told to trust the plan and enjoy the show.
It’s insidious.