Chrome's weird behaviour with Google

[Exos9]

Hey guys, so for the past couple of days I've noticed something a little weird but mostly extremely frustrating when browsing with Chrome. Google is literally taking several seconds to load on a gigabit internet connection. First, I had an erreor about their SSL certificate being out of date, when the certificate clearly stated it was valid until March 23rd, 2030. I somehow got it working on Chrome again, however Firefox and Opera are giving me an error ("SEC_ERROR_UNKNOWN_ISSUER"). I've tried all the solutions I could find on google but with it not properly loading n all.. it wasn't super successful. Here's a video to show you what I mean. The page finished loading, I can click on what's there but it doesn't show up for a solid 5 seconds. 

Here are my specs, but this shouldn't be a hardware problem:

W10 latest

Ryzen 7 1700@3.7GHz

16GB G.Skill TridentZ CL16@3200MHz

MSI X370 Krait mobo

MSI ARMOR GTX 1070

All my browsers are on my SATA SSD.

 

I've tried flushing my DNS, changing DNS servers (I use a raspberry Pi running Pi-Hole), clearing all the SSL certificates, clearing cache/cookies/browser history, etc...

Please help