I'm a pitcher's dad, so I feel your pain. But, the fact that the starter gave up 4 runs and 3 more of his runners scored lessen the blow for me. 7 runs in less than 2 innings, he probably deserves the loss, even though the game took some other turns from there.
What irks me about this process is a starter goes say 5 or 6 innings giving up 1 run and is behind 1-0 when he leaves. Relievers give up another 5 and the team loses 6-5. That's a tough loss to take because the starter pitched well. But, this pitcher gave up a bunch of runs on his own, so I really don't see that he deserves anything but the loss.