Thanks for the feedback, everyone. Thanks for various thoughts on use of the commander. I definitely don't just have mine sit there on any map size, to be clear.
Yes, custom games are one option but as maudlin points out, that may involve waiting a long time. What I have always loved about the 1v1 is that I can click, wait while reading an article and then pretty soon a game loads. I don't think I'd get much joy out of the alternative.
FX, I know we discussed this yesterday but I ask you to believe that this is not all some result of losing a lot on 5x5 maps. As you say, I lose on other maps too. If you are just going to assume that everyone who disagrees must be a sore loser rather than have a legitimate point, obviously there is nothing I can say.
But I honestly think I would rather lose on a small, medium or large map than win on a 5x5 map all the time. The former I can learn a lot from, there is huge variety of games, every one is different. On 5x5 they're all the same, whoever wins - com rushes to middle with lvl1 and a struggle ensues in which one of them dies. If you think this is the peak of Supreme Commander, you would have the same map limits for everyone, but you don't - you clearly see a variety of map sizes as a good thing. I am simply saying I want that even as a rusty player whose rating has fallen a lot. Maybe it's a learning experience, maybe it's not but I would rather learn in a way that is fun and varied even if I learn slower rather than play endless com rush on 5x5 map games.
Your other point - that 5x5 was only 9/20 games - I have a lot more time for. Subjectively it certainly feels like even higher than 45% - maybe your sample was unusual - but either way, I think 45% of games on the smallest maps is way too high for my tastes. If one game in ten or so was on a 5x5 com rush map, I would not be raising this issue, or thinking of quitting.