The first is the 20-something former player who can't quite identify a viable career outside of softball, so they try to give lessons and coach an organizational team. They could be making more money working a fast-food counter, but they are going to take your DD to the scholarship Promise Land. They might, at some point in the future, be a good coach. However, right now, they don't know how to teach, manage a game, or deal with parents 10-20 years older than them. As they have no kids on the team and no friends behind the fence, they usually have zero personal commitment to the team they're coaching.
Our org pairs one of the parents with these coaches - sometimes as HC - but more commonly as Assistant Coach/Team Manager. Their job is to deal with the parents, support coaches decisions with parents, block parents, support and guide the head coach, etc, etc. After 3-4 seasons if the coach starts to build their experience we then slowly take away this coverage. It had worked well for us.
BTW the WORST situation - and one that is NEVER good - is the 'non-parent coach team' that is really being run in the background by one (or a group) of the parents. Basically they bully the non-experienced ex-player nominal head coach into doing their bidding.
The second is the experienced older coach...usually a guy, and you can't quite figure out why he's there dealing with adolescent girls when he probably would have more fun umpiring or simply staring off into space. While there are some kids other than my own that I like being around, there are others who I can't wait to put in the rear-view mirror. This older coach may run an organization where he's charging big dollars for some promise of a college playing opportunity...somewhere.
This is why I umpire. In and out - if I don't want to, I don't have to. Once DD is in college I will likely umpire more and more but I also suspect I will very likely get dragged back into being a head coach or assistant or something at some point down the track. But no rush. I suspect it will be a personal favor to someone when it happens.