Both my DH and I help coach club sport to kids as volunteers - neither of us do football.
We get a lot of satisfaction seeing the kids develop and learn new things. And it is the purest type of joy to see your team do something together and have a poetic moment of play.
But it does feel like free child care, there are kids that turn up and disrupt the session, parents who give you a hard time because you haven't picked the best team ,because you have picked the best team, because the guidance from child protection says you have to do it a certain way, because they didn't get an email, or because the coaching guidelines say you have to do it a certain way. Parents drop their kids and run.
We only do it for one reason ... our kids get the benefit of playing a game we love. Neither of us are very good at picking our boys for player of the week but our kids do get picked for the team. Our kids are good at the sports they play with us - they've played them, watched them, watched us since they were babies. I don't think it is unreasonable for a coach's kid to get picked for the team. I've noticed that it's often the coach's kid that is amongst the most talented though not in all cases, DS2 i'm grinning at you.
That said, our boys do have off the pitch time and my husband has been known to leave one out of the team for a tournament as it was his turn - not had to do it myself.
We have come across some really personal shouty coaches on other teams but I try not to judge too much because nothing has tried my patience more. Shouting is required so the kids can hear you on the pitch but I do think if the amount of shouting is saying negative rather than positive to the kids it isn't helpful to the team.
Both our sports are governed by fair play rules - giving children the opportunity to play regardless. I'm sure football is the same. So if it is not having a turn that's a problem you should highlight it - start with the coach. If the coach's style is a problem your choice is to complain or to go to another team.
But to all those who are saying that people don't have to do it, you're right we don't but then my kids would miss out and yours wouldn't get the benefit. There aren't a queue of other people behind me or my DH wanting to put the effort in. I just want an occasional thank you and if you have a problem to talk to me first before I hear on the grapevine that you're unhappy.