There is no reward for playing well.

[Bobby66]

The comeback matches are the expectation and not the rule. I am a try-hard and will always push for the victory no matter what, but I do get why some people may rather just give up and head on to the next match.

[Valence]

Comeback games are most of the time due to the winning team throwing the game hard. They're an anomaly and generally not really actually pushed from any defender's advantage.

The spawn being closer to the defenders doesn't actually constitute any defender's advantage as the speed ramps on every map allow the attacker to get there as quick (speed ramps are actually one of the worst design in that mode but that's another story). Spawn points can even be harassed hard when the attacker is already snowballing and don't hold any special effects in favor of the defender either.