Also European here. You might not have tried the right peanut butter. Many big-name brands add sugar and salt, and also palm oil (to prevent separation). If you try peanut butter that's actually just 100% peanuts (you'll know if you have to stir it first) then you might have a different experience. Or you might not.

I lived with a guy from France a few years ago and he absolutely hated peanut butter and couldnt figure out why we all ate it so much. Had no problem adjusting to pepperoni cheese steaks though!