I always play with the controller like this (bad?)?

Is it bad when I play games like that (e.g. Fortnite) When I try to play other games I do it automatically.

The internet doesn't care how you hold your controller xD

I just want to know if it's somehow bad for the wrist or for the hand.

You will notice that at the latest when your hand hurts. If not, treat yourself.

What do you mean by bad? Bad for your health?

Yes, if it's bad for the hand

The international gamer league will ban you from the community of gamers for life!

So I would not continue to play like this, because it is harmful in the long term due to the abnormal position of the fingers. E.g. Ghost Kamo and Ghost Issa used to be a duo, but had to quit because Issa played Claw and suffered severe pain in her fingers and wrist. After 5 months it works again.

Sorry, don't know.

If you play this for more than 1 or 2 hours it can lead to problems. It just depends on whether you take breaks and then take it easy. I think there was once a Fortnite pro who always played like that and he would have to give up his career because he was just in pain. I'm on the mouse and keyboard and can play 9 hours at a time without any problems, but after an hour I notice my hand cramping on the controller, but I don't know if you can play so relaxed. If you don't notice anything, go on as you want