Doug Polk talks about his experiences with this here

https://ruggedappeal.tumblr.com/post/183610362880/online-games-home-entertainment-at-its-top

Downswings are always going to be emotionally trying; there’s no avoiding that. The best we can do is prepare ourselves mentally for downswings, just like how we prepare our bankrolls to absorb them. If we accept that downswings are inevitable, the variance becomes a lot easier to deal with.

Variance is also the cause of the second biggest downside of being a professional IDN POKER player.

When you keep getting sucked out on, or seem to run into the nuts at every turn, it can start to affect how you play the game as well as your motivation to continue playing it. Doug Polk talks about his experiences with this here:

https://potentialpulchritude.tumblr.com/post/183610413329/free-electronic-online-gamings

https://ghostly-remains.tumblr.com/post/183610398547/online-gamings-enjoyment-at-its-prime

https://nofcxgiven.tumblr.com/post/183610386678/why-online-games-are-even-more-popular-than

https://l-chairman-mao.tumblr.com/post/183610375665/free-virtual-online-gamings