Website Scrolling On Mobile Device REALLY SLOW!

Just recently got my wordpress blog https://www.thetoptengames.com up. The mobile version for this theme was basically just a mess so I deleted a piece of code to get it to look like the regular one. But for some reason my website is incredibly laggy, especially when scrolling and zooming in and out.

Please could someone try with a smartphone or something and take a guess why it’s happening?

I appreciate all the help I get!