My problem is getting over-obsessed easily and losing track of when to stop to take a break, instead head-smashing against stuff until I get burnt and need to vent a little. I've had to take long-term breaks from Pokemon just because of that. Please do take that post as what I needed to write after 5~6h of near non-stop laddering only to see what seemed like my best chance get tainted by two consecutive losses (with bad luck, to boot), and never recover from there.
As for your quote, reading that is the only reason why I even thought I had a chance to get reqs, as 80% GXE is something I only got once at my peak performance in SS Ubers, and only for a short time. And when I tried to get there, I got so close I understood you were right and it was possible, but still managed to always be one step away of my hand. Which made me feel like I shouldn't give up, but that causes the aforementioned issues. Worst part is, I pretty much threw away a couple of games with terrible performance just out of fatigue.
Have no doubt that I do enjoy the game, and have loved it both in its cartridge form since Gen 1 as a kid and in its competitive form since Gen 6 when I started to build teams. I just REALLY need to know when to stop to take a break.