I managed to find the TV series that I was looking for myself, after literally none of you got it right. It's The Gifted
Thoughts on the first episode: It was good, but not great. The effects were very cool and the characters are not annoying. The X-men apparantly did exist in the universe so If you are a Marvel fan you will definitely like it! I will give it a chance and watch a few more episodes cause I am interested in some of the characters.