7-8 yr old playing time - am I overreacting?

Am I overreacting? We signed up our son for basketball 7-8 years old. There are 10 kids in the team. The coach starts the same 5 players every game. The coaches son plays 28 out of the 32 minutes. Another kid plays 25 minutes and the other 8 kids split the playing time. Not my kid, but another kid only played 3 minutes the last game.

I really want to say something to the coach but don’t want to be “that guy”. Am I overreacting? Is this discussion worthy? I can only imagine the other parents feel the same way.

With 10 player and 7-8 year olds, shouldnt fun and fundamentals be more important then winning. It should be hard. 10 players. Two 5 minute lines…