It's hard reading the webtoon page by page. Can I change it to load all pages and scroll?

Yes, that's how I read ALL the manga/manhua/manwha on this site. I sign in and click "multipages" when I open the manga. After that, multipages will be the default. (At least, that's how it's been for me. Only when I clear cache/cookies/etc do I lose that and have to sign-in and click "multipages" again.)

You could also go to the original, it's formatted to be read vertically.
https://www.spottoon.com/workHome?book_no=18