The entire network stack and the whole OSI concept is awful... The way DNS and TLS and certs are done kind of sucks, ARP is pretty insane... not much in network

The entire network stack and the whole OSI concept is awful... The way DNS and TLS and certs are done kind of sucks, ARP is pretty insane... not much in networking is all that nice, there's not really any piece of it that is as awesome as something like a nice Python library. Encryption could have been IP layer, DNS could have always been secure, certificates don't need to exist if IP addresses and DNS were secure by themselves, separate IP and MAC addresses might not really be needed ... But the fact that there is a global standard internet protocol is amazing!