I used to be a rigtard myself, and have published articles online arguing that online poker is rigged. (Those articles still earn me a few pennies per month because the writing site doesn't permit me to delete them.)
The problem with online poker being rigged, however, is that some player must win every hand. It's not possible for a site to be rigged against absolutely everyone. If you're going to allege sensibly that online poker is rigged, you have to come up with which players benefit from the rigging and why it would be in the poker site's interest to have those specific players benefit. And I haven't been able to come up with an argument of that sort--not an argument that the site uses shills, or that it relies on bots, or that some players on some tables simply don't exist and their winnings get funnelled into Raymond Bitar's retirement account. None of those options make much sense.
That said, I don't understand college-level statistics well enough to be able to analyze the random number generators that poker sites use and satisfy myself that they aren't skewed in some way, so my mind remains open to proof from those who have done the analysis and present it in a way I can understand. If someone can explain to me in words of one syllable just why the random number generators are or are not skewed, I'll be satisfied.
And there's another thing. Variance evens out to zero only over an infinite number of hands. In fewer than an infinite number of hands, the chances of running at exactly neutral luck are almost nonexistent. Over the course of their entire, finite playing careers, some players will have positive luck while others will have negative luck. That's just the way it is.