I don't know anything about this situation from last year, but many parents have no clue how hard the coaches work to balance plays. Especially on teams with 29-30 players. Add in, at least 4-5 players who have little to no desire to be playing football. Their parents made them join the team. What some parents also don't see is, making a kid play takes 7+ plays per game away from kids who are there trying and maybe just haven't put it all together yet. Put 3-4 unwilling kids out there and that's 21-28 plays taken from kids who give effort in practice and truly want to learn and be there.

Give the coaches a little week 1 grace. Before the first game, we have 3 weeks in pads (roughly 9 practices) to integrate kids who've never played a competitive sport in their life and try to find a good position fit for them. All of this while we try to piece together the other 20 kids who've played before and have been working their butts off in the off-season to try to earn a new spot on the field. In 6th grade, several kids have been playing for 2-3 years. The team they're about to play also has 15-20 kids who've been playing for 2-3 years and are working to assault any kid on the field who lines up against them. This isn't 2nd grade. Some of these 11-13 year old players are men.

A truly concerned parent would talk to the HC in person or at least have enough spine to reach out to them directly. A forum post is a cop out.

Sidebar about minimum plays:
In 6-7 grade there shouldn't be minimum plays. These kids need to be prepared for school ball, where there are no minimums. The kids who are most athletic and physical will play. That isn't to say kids won't work their way in to playing time. They will eventually hit puberty and could end up being really good players, but giving them minimum plays when they're in the 6-7 grade isn't what keeps them playing. What keeps them playing is a sense of community on the team, coaches investing in them and parents who give them a real perspective. Football is one of the only sports where they won't get cut in MS/HS. Kids can find a place to belong and the comradery of a team, even if they don't ever see the playing field during a game. I've heard of some of the larger 6A schools having 80-90 kids on the 8th grade team. Most of them split in to 2 squads A and B. That's 40-45 kids competing on each squad. Maybe 25 of them on each squad will see playing time in 8th grade games.