Won't wear jacket

My 3.5 year old does not want to wear his jacket coat. He will keep pulling his arm out and will keep fighting me on it. I have seen some people say then just don't make him wear it but I dont really agree. I think it's a boundary with having to wear it in the winter. It is a big trigger for me when he fights me on it. I get so overwelmed because I don't know how to handle it and trying to get to preschool on time. We both were in the car crying today.
On that note why do you all do this again? Like honestly? I would absolutely never do these last 3.5 years again if you paid me a million dollars. I feel so different from everyone. I truly don't think I was wired for 1 child or at least a young one. Thank you for the rant. Lol