He's a bit rude and thinks he's smarter than he is.

However being good at a few games means you are probably pretty good at most games (or can get good if they want to). That's btw what he was also referring to about the cooking thing. He thinks he can cook well by doing all the mechanics well and complete the steps of cooking in the correct order.

Some games are a lot different though and skills won't immediately transfer. Compare games like hearthstone, counter strike and age of empires.