I actually played Team Fortress 2 (a first-person shooter) competitively for a while. I was a team leader, IGL, and main damage (so to speak... it doesn't quite work the same but it's close enough) in ESEA for a few years. Met some really good friends and witnessed some ~juicy~ drama over those years (was even sorta involved once, when my team got moved playoffs after initially losing out because the dudes above us got caught getting paid to rig matches). And of course, LANs are awesome and wholesome and I got drunk (I never drink) and tried to dress my teammates in my clothes... good times. Then I got bilateral RSI and now I think it's peripheral neuropathy and I had to quit; I coach new players on how to enter the competitive scene now and admin some tournaments sometimes.
None of my current stories feature video games particularly prominently, but I am throwing around an idea of writing a series of YA novels about someone entering esports. I've seen a few around, but they're always written by someone with very, shall we say, peripheral knowledge of how it works and they always feel the need to make it more exciting/dramatic. Dude, you don't need to add terrorists and world apocalypses to competitive vidya games to make them exciting, trust me. Just the players themselves are enough. The DRAMA, the accusations, the emotions run rampant of literally being voices in eachother's heads.... That's the good stuff.