Noob is a commonly misused phrase, often meaning "new player" The word is misused, probably as "loser" or "dumb". It's just an insult.

Because they cant accept the thing that they are noobs (the people calls noob if they are mad) and the guy/woman is pro.

You're not supposed to get mad. Noob is just a harmless name. Just get good int he game and you will be called a pro

People call you a noob because 1st ovule they don't know what t means it means new player second ovule they call you a noob because they think that you are ruining the game. But your not

Because they want to feel like they are doing good when they are doing a complete opposite of that and then they are sorry but the person don't wanna hear that

They use it as an insult