Sure. My visit was part of my interview loop for a Director-level position at Riot’s HQ in Santa Monica several years ago. YMMV, but it had several unsavory elements, e.g. introductory fist-bumps (a bit odd in my business attire, but given the company logo and culture, I get it), a very disorganized interview schedule (shuffled between different buildings and conference rooms) and sadly, several senior engineers who expressed a “my-way-or-the-highway” attitude and ego…
My friends at Riot say that things have changed in recent years, but I would summarize their issues as growing pains that accompany too-rapid growth. I still hold Riot Games in high respects for the problems they’ve tackled at scale, their advancements of e-sports, etc., but my interview experience soured me enough that I stopped playing/watching League and haven’t looked back.