I wasn't being mean or grumpy either. You sound very intelligent and confident, as well as realistic, so the negative perspective cannot really apply to yourself. It's just something I felt vaguely relevant and offered up.
It is much more exciting working on a project with a team, but only when each member is, with some amount of talent, contributing to the process. The opposite is sadly something too often encountered.
Not to say people shouldn't 'start somewhere'. But before trying to add to a team effort, one should have individual experience to draw from. One particularly disappointing example is, when a team of teenage dreamers were making their epic RPG and I was drawing/modeling some stuff for it, they went and recruited anyone and everyone regardless of skill level, as though they (the core developers) had no discerning eye at all. It rather disappointed me to find that, despite all the frontal semi-professionalism, the founders of the project knew approximately nothing about games and game development at all. The design document had a massive fantasy world described, but was vague on play and content issues; a strong starting plan and direction being so important, I couldn't help but feel it was a lost cause to try righting.
On the other hand, it was probably a lot of my being critical that caused myself to leave them. I did learn a lot about teamwork from that brief encounter, and if ever I would join a team project again, my perspective would be different and much more open, if always remaining skeptical at first.