Halo 4 XP limit reached!!!

Why is there a limit on XP I know theres boosting but I geting ready to leave this game.I cant level up any more I only play for 3 hours and I hit the xp limit.I even bought limited edition and I was planing to get limited edition xbox but whats the point if this happens ever day.halo used to be my favorite game.

Whatever happened to playing for fun these days?

Truth be told, I would NEVER play matchmaking if custom games had a browser and gave the same ammount of xp. I only play matchmaking to rank, when I hit the cap, its customs and campaign time.