dupuqub from google synch I mean you need to log out from google (synch word I used so you can know which account I was saying to logout). turn off synch will do nothing.
because you did reinstall windows twice but not worked then I am 99% sure that if you logout from google account then it will definitely work. and also remember when you remove google account from chrome it will ask you to clear bookmark, history etc from this device then you have to check this so data will be cleared. After that it will work.
let me share you my story about why I think this will work. 7-8 years ago my browser was showing me weird fonts on every website, Gmail, google, yahoo etc. even some cloud applications too. I tried lots of things like you doing now but nothing happened I also tried windows reinstall. After windows reinstall it was working fine but after few hours it comes back I didn't realize how it was coming back I did windows reinstall many times then I realize when I log in to google account after few minutes I got that weird fonts again. Then I just did logout from google account and weirdness was gone. This is why I am suggesting you to remove google account from chrome.