Everything about Riot Games sucks. Their employees are toxic, there's many cases of sexual harrassment reported, the forum mods are $#*!s and often contradict their own rules. Their main game - League of Legends, is a buggy, unfinished mess. The client is a Chromium tab that often uses more than 3 CPU Cores on a modern machine, while looking like a design straight out of a 2010 mobile game. It runs worse than the actual game. The customer support is a mixed bag. On one hand, I've had some decent experiences with account related issues - the person helping me was nice and ultimately solved the issue. However, there are many people that'd claim otherwise, including problems related to something as basic as deleting an account.
The development team is pretty entitled. Any problems and related solutions proposed to Riot get handwaved away, with claims such as "our team has 200 years of game design experience". They don't see the problems with the game, because they barely play it, as was already proven - most members of the balance team are really bad at the game.
Overall, Riot sucks. Don't work there. Don't support them.