To complain to the school?

[estak]

DS is in year 10, he's very into drama and has always been interested in the school productions etc. This year, he auditioned for the main role in a musical, he got it and was happy. Another boy in his year also auditioned, but was offered another part, the boy wasn't happy with this and refused to be involved in the production if he wasn't getting the main role, this boy is known to mess around and DS has told me a few times how they've missed drama due to the teacher being distracted with his behaviour. The teacher then gave the part to the other boy and has told DS it's unusual for other boy to want to participate and DS has involved every year there's been a production so it's only fair to give someone else a chance.

WIBU to complain?

The other boy is also year 10, I also think if the other boy wasn't interested in the smaller role, he shouldn't have been given the main, they both auditioned and DS was told on Monday he was the main part and then yesterday he came home upset and told me what the teacher said

That is really bad of the teacher.
incredibly biased too.
Teacher sounds very easily swayed and blatantly prejudiced towards a bully whose behavior they allow to dominate lessons
not the sort of person who should be working with young people

id definitely complain, and if no satisfactory resolution, then I’d be encouraging DS to join an xterm alliance drama club and leave the school one.

which might be petty, but it’s justified, imo

DS currently also does a drama club out of school but he wanted to do the school production as well as he has every year they've done one - and he's not always been a main role so it's not like he's been it loads of year's in a row etc, if he was I could understand the teachers reasoning