JaguarFiendTL;DR - Coaches too often dm-carry their teams instead of actually working with their newbies. Coaches should have to play medic, or (even better) be a spectator and guide their teams without being on the field with them.
Shoutout to pie_hero. I've watching him coach and he's so damn good and professional, it's heartwarming. Kudos to you!
Same exact thing pretty much happened to me the last two mixes I coached. Except there were TWO players on the other team that both had esea experience, weren't playing medic, and they weren't even the coach. It was a brutal slaughter and my newbies were absolutely destroyed. I told Noona about it afterward, and it wasn't 100% their fault, I just wish there was some way to prevent stuff like this.