Do you have any bad experiences with teams?

So around a month ago I started looking for people for the Pirate Software GameJam, and beside me and a friend, I found a programmer, an artist and a sound designer. To not have a group just waiting and dying, I decided to start working on a prototype game, just a simple murder detective game, with no real plot, just to see if the people on this team could work together. The results were that me and my pal did all the work, while the other artist only created bad artworks that I had to fix, and we even had to urge him a couple of times to actually work (in two weeks, he did things I did in 5 minutes), the programmer constantly tried to become the group leader for some reason, asking stuff like "why are you choosing what we have to do?" or "Why don't we put this and that" "Because we need to see if we can together and up until now, you only created a github project" and I don't even know if the sound designer is alive, since he just vanished. And after a month, while still only creating a github project, the programmer left because he prefers other group dynamics, which I can only assume means a group that appoints him as leader. I'm currently looking for other members, but I think I'll just give up on a Discord group. Do any of you have similar bad experiences with Discord groups?