Hmm, a couple of points. A lot of people saying that OP was ignoring the objective, and I have to disagree. I think his plan of killing enemies was totally valid. If the enemies aren't alive to effectively splatter paint, then how can they win? To add to that point, a good team should have rollers and other players doing the covering, so it isn't like the objective is ignored all-together. The fact that the top portion of the map is a bit strange, though. Still seems smart to me.
Second, why did you keep running back to shoot up at the enemies' bird-nest? I noticed it a few times. Were you hoping to get a kill, opening the area up for others, or something else?