Why my innertube is so big
The sizes match, so according to the manufacturers you are on the safe side.
It’s not uncommon for tubes to be slightly too “long” (i.e. have a wider diameter). Maybe it’s because this tube also fits 635mm wheels and not just your 622mm.
Just try to “distribute” the excess length, so you don’t have one big kink in a single place. In your photo it’s also not fully inside the tyre.