It’s easy to understand, when you turn the brackets into readable characters.
o for opening bracket (
c for closing bracket )
So ()() would be ococ, which is coco backwards and clearly not a palindrome.
())( would be occo, which is a palindrome.
Delete it yourself
Have you heard about ventoy?
You can put this on a flash drive and then just copy a bunch of ISOs on it and have a nice little boot menu where you can choose the ISO you want to boot from.