First two posts sum this up; Halo 4 can be a grind, a competitive multiplayer experience, a casual outlet, or any combination of the above. It really comes down to why you jump into a match in the first place.
If you look at the unlockable armors and their requirements and decide that you will spend your time in matchmaking working towards those unlocks, then playing Halo 4 will be a bit of a grind.
If you go into a game looking to play well and contribute what you can to your teammates, then Halo 4 matchmaking will be your outlet of competitive play.
If you want to play the game with your friends over for the night to have a good time with your friends, Halo 4 is your casual outlet. For the same reasons, Halo 4’s Forge and Custom game lobby could be a tool for you to create new experiences for your friends.
I play Halo 4 for all of these reason. My eyes are set on my progress bar to the Promethean ordnance mastery for the Believe pose. Heck yeah I’ll choose a scattershot over the shotgun.
However, I also care about doing well in my matches. I set personal goals for all my matches: die the least and/or get the highest K/D spread. After I took these up, I was able to get my first perfection. I play to be proud of my efforts. I am fine with joining an ongoing match on the losing team when I am able to get the highest spread in the match.
I also love to use the Forge and make a new game. I’m not the best forger, but it is always fun to make a game exploiting glitches in the game b/c my friends are unlikely to have seen them before. There’s a way to make the Spartan Laser rapid-fire? Time to make an infection gametype: Fend off the Wriathes!
Video not by me; how I found out about the glitch:
Halo 4 was made to reward players for everything they do through commendations. They are there to snare some players to the game with a system that says: play a lot, get these rewards your friends don’t have. They get players that do not necessarily like the gameplay think that they have made an investment: they can see that they have gone so far towards a helmet or visor and might them feel obliged to continue playing.
OP is upset with this system. It is probably b/c OP feels that he has been burned by the system, that it has wasted his time. If OP and many others liked the game itself, few would be moaning about the unlock system.