If you are working in a decent workplace, you will receive lots of feedback on your code and what you do. Don’t take it personal and learn from them. Sometimes there are multiple correct answers and yours can be one of them, but each workplace, project and senior colleague has their own concerns and priorities. Sometimes feedback seems to be on a trivial mundane detail, and sometimes it really will be. If you think it is valuable feedback, learn. If you disagree, discuss. Enjoy!