Some people take their hobbies very seriously, and I can't blame them.
Imagine if you will, you're an RPG enthusiast. Doesn't matter if its D&D, Rifts, Battletech, or Warhammer 40k. You've got your group that you play with. You've got your game master who comes up with really enjoyable campaigns. Its game day. For the next several hours you get to forget about your job, forget about your life problems, forget about being a virgin who can't get a girlfriend. For the next several hours you get to have fun with your bros, maybe have a few drinks or pass around a joint, order some pizzas, and lose yourself in the campaign. You get to be fucking Conan the Barbarian, or Legolas, or a power armored badass with the biggest fucking guns you've ever seen. You've spent time and love crafting your character and leveling them up, and you've spent enough time with your bros creating a cohesive group that works well together.
Then there is a knock on the door. One of your buddies says "Oh yeah, my friend/cousin/little brother is joining us today. It's his first time playing." You think to yourself "OK. I was a first time player once." The door opens and in walks some fat tard dressed like a pre-teen girl, toting bags full of kiddie toys and portable gaming devices. The newcomer sits down and rifles through one of his bags. He proudly proclaims "I've created my own character!" and slaps down a character sheet that is woefully unbalanced, has obviously fudged stats, and isn't even a race/character class from the game you're playing. The newcomer doesn't get the rules, whines every time things doesn't go his way, and argues with the game master.
Chris is a child in an adult body. He doesn't care about the rules, doesn't care about the lore, and doesn't care about fairness. Chris wants to feel like an invincible hero who never loses. Like a child, he thinks that's cool. He doesn't understand that an invincible character who never loses is boring and pointless. No one wants to play with a child who wants to be all powerful and invincible because it sucks out everything that makes these kinds of games fun.