I want to explore the Nether and spawn somewhere else because there are too many Endermans in the area where I spawn, and I get attacked by them even though I'm wearing a pumpkin helmet. I destroy the portal and rebuild it somewhere else and I still spawn in roughly the same place.
One block in the nether corresponds to about 7 blocks in the overworld. You should keep that in mind, so walk a little longer.
The fact that Enderman spawns so often is not due to the position in which you are. Another place won't change that. As far as I know, the spawn rate is not variable in the overworld.
And why am I constantly attacked by them, or even when I'm not hurting them? Even a pumpkin helmet doesn't bring anything
As far as I know, that must be a lag if you don't hit them 🤔
With the pumpkin helmet the view is also terrible.
Do they only attack when you look at them?
Only when you look them in the face or harm them