The kid needs to stop being such a cry baby and suck it, and his (assumed) brothers need to stop mocking him for sucking so much. Practice makes perfect, but the "practice" of getting your ass handed to you multiple times by your brothers is useless. I never bother with multiplayer until I've completed single.

On a different note, my proudest ever Halo Multiplayer moment was when I shot a guy in the head with a sniper, as he was trying to run down my mate in a Warthog. I then proceeded to shoot my friend in the head too, whilst he was jumping. It was a total fluke for me to use 2 shots to kill 2 moving targets like that, but I'm still proud of it.