Choppy scrolling & low speed rating

I am working on my personal portfolio. I have been building with symbols, reusable interactions, optimized images, etc. But I’m currently finding that movement is very choppy, site flickers (especially when opening menu), and site speed tests are giving it poor ratings. I checked chrome console, I don’t see any errors.

I mostly see this on Chrome.

I’ve removed any additional code I’ve added to check, and that’s not making a difference. It’s a pretty light page, so not sure what else to do.

I am using scrollify for section snapping.

I appreciate any help! Thanks.

Read only link: