That's it. No proxy and no odd routes but you left off the List contents of hosts file. The program did clear the DNS cache. I don't suppose that made any difference?
I see you have Kaspersky and also that Kaspersky provides a VPN tho it does not appear to be in use at this moment. Can you pause Kaspersky and try your Instagram again
Also try using the Kaspersky VPN
IG is working now, maybe it was a DNS error