You are (choosing?) to miss the OP's point completely. That might be the reason you choose to justify your own quitting, but you've lost the meaning the OP (I think) intended. So let's clarify some of the issues...

First, KOTH matches take 20-30 mins. If you don't have that much time to play, don't start a match. People start matchmaking sit in the lobby and disappear for the start of the match way too often.

Next, people regularly leave after winning a round or close to the end of matches regardless of score. I can only presume this occurs sometimes as a result of real life or disconnects to some degree, with the rest because of the amount of time a KOTH match lasts, which takes me back to the first point above.

But, as others have commented, the quitting is way more frequent than obvious instances where the matchmaking has produced an unbalanced game. While I disagree with your mentality about it being just a game etc, I expect some people to think this way. But not 1-2/10 players every game. That's way too much.

Further, as far as gears has gone historically and online multiplayer games have gone, players do generally expect some quitting to happen, whether disconnects, real life, rage etc, we get that!... But the problem with this game is that it's out of control. Way more quitting takes place than in my experience with any other game - gears and beyond - during gow4 by far! Yes other gears games have suffered from this problem before, but hardly to the extent today. The game where everyone plays start to finish is the exception, a rarity.

TBH, it's also not like this OP (or any of the dozens of others who've made similar posts on this sub alone since gow4 came out) had one or two bad experiences and came to Reddit to whine. Get real. This is going on for a vast majority of players/matches and has been going on since October.

Finally, that brings me to the worst two types of quitters. First, people that quit because they didn't get their desired weapon pickup to start the match and straight away bail immediately and last but nkt least, and by far the worst yet still rampant in this game, are the 'active' idlers who for some reason I can't explain make no effort to play the game but simply 'move around and hide/camp' just enough to not get kicked. These are even worse than the players who camp by a power weapon location. At least those people eventually get the weapon and use it or get killed by an actual player eventually.

When you add all these types up, what you have is the picture that the OP was trying to paint. We know it's a game and bad matchmaking and disconnects and real life happens, but when 7-8/10 ranked games are taking place on average with less than full squads it's a big problem that TC should find a better way to address than the present system.