You see? You have to do something about it! I have zero qualms about requesting a rematch after being thoroughly beaten. Most times, people accept and I get thoroughly beaten again but that doesn't stop me. That's part of the fun right? the competition?
The only detriment I can think from such fierce competition I guess is that it doesn't really leave much room for "casual" players. The other day I was playing and someone requested that only casual non-pro players join. Which, when I played him, I realised he took it to mean "no rushing". Which I thought to myself ok. That's fine, but even to play a long game, I could just see myself taking all the ore spot before he did and having twice as many units and defenses. I guess there's really no way to downgrade your level.
The only thing I could suggest is perhaps a sticky with commonly asked questions. Like how do you build so fast? When I first started playing, there was no one to tell me that the more barracks, or MCV's or war factories I had, that the faster production would be? Maybe a sticky with basic builds? I mean I've seen countless "pro's" build in the very same order without any variation.
Anyways, if any player sticks with it for more than a week, they usually discover these things for themselves. But I can imagine how disheartening it may be for completely new players to constantly be losing.