Hello everyone~
Thank you for bringing this issue to my attention; Prior to this thread, I was unaware of the mass amounts of misfit coaches, only in small groups, where I immediately tended to the issue(s). This response is going to clarify some things about getting coaches, coaching, solutions for the future, and the other topics addressed in this thread.
Since I am one of the newer faces in the tf2 competitive community, I cannot recognize good to bad coaches as easily as others can. As a former newbie, I trust the coaches that have provided me with good advice, improving my game. These are the coaches I will refer to when appyling a new coach. Ex: Marxist, Phrakture, Pie_hero, Dobb, Reilly, etc... To become a coach you must have a MINIMUM of a GOOD (meaning a positive W/L) AND to be approved by one of the coaches above. There is a 'Newbie Mix Coaching Guide' for newer coaches that wish to improve on their coaching here: -> http://pastebin.com/Np2FKihm <- Big thanks to dobb for putting this together! This will take care of the issue of inexpereinced coaches, and if this problem persists in the future, more precautions will be taken.
To improve the coaching process: We will now restrict coaches to the pocket or medic and only a last resort to demo. This will eliminate the coaches ability to 'carry' their newbie team by solely dm'ing it out. One thing that all coaches have to keep in mind during mixes, is that the pugs are not meant for your team of newbies to win; they are meant to teach the newbies to the best of the coaches abilities.
We will no longer have two coaches per team. Having two coaches per team, putting one on the combo, and one on flank, is not an enjoyable experience for newbies, since the coaches dm are often greater than that of the newbies.
TL;DR - We are improving the overall quality for newbies and coaches, and regulating coaches and the coaching process. If you have any further feedback or questions, respond on this thread or add me here: http://steamcommunity.com/id/Groovy_Noona/