I have three children who have all played football and have also managed and coached a team. I am an FA qualified coach.
My first son was very enthusiastic but not very good and used to be played for only a few minutes at the end of the game or not at all. I asked him if he wanted to move to a different club but he wanted to stay with his friends. I didn't say anything to the manager but wish that I had - I would now. At the age of 11, he was told that he was no longer wanted for the team as they had recruited some new, better players.
He moved to another, less victory-focused club and played much more, partly because he was no longer the least accomplished player and partly because the coaches were much more aware of giving each player a fair amount of game time.
I eventually took over the team as manager and coach and told all parents and coaches that it would be my aim to give each player at least half a game of playing time. I often had 5 substitutes and was also trying to win games so I had to try not to let the team become too weak or unbalanced - it was more difficult to do than I had expected. We had rolling substitutes so I literally made a chart for each game to make sure that each player got a fair amount of game time. This was not universally liked by the parents - the parents of some of the better players didn't like that their children didn't play more and that we sometimes lost games that we could have won if I had not played the weaker players (the kids were perfectly happy with the system) - but over all it worked well and I was proud to have given boys who loved football but were not great players an opportunity. Ironically, by this point, my son had grown, got faster and stronger and would have played a full game every game if he had stayed with his previous team.
My second son joined a team that stated at the start of each season: "we are trying to win every game and we will pick the team accordingly." My son was one of the fringe players and didn't get to play much but he enjoyed the training and so was content to stay, particularly as he knew at the start of each season what the situation was.
Personally I believe that outside of professional clubs' academies (and that is a whole different world) all sports teams should encourage all players to reach their full potential whatever their ability; unfortunately there are too many parents involved who focus solely on their child and can make the lives of the coaches very uncomfortable, there are too many coaches who don't realise that their main purpose is to allow and encourage their players to benefit from exercise and being part of a team and that winning, whilst an important goal, is secondary to that.
My advice to the OP is to talk to the coach. If the coach says that winning is the priority and the needs of each individual have to cede to that: find another team or sport.
My advice to all other parents is to ask the coach or manager before the start of the season whether they intend to give each player a decent amount of playing time (it doesn't have to be equal for everyone, just more than a token 5 minutes) and then decide whether to join a team based on that information.