FWIW, the Technicolor router I have from my ISP (Telia) is also deeply flawed. It sometimes tampers with TCP sessions from specific apps, setting the TCP sequen

FWIW, the Technicolor router I have from my ISP (Telia) is also deeply flawed. It sometimes tampers with TCP sessions from specific apps, setting the TCP sequence number to 0 for specific packets (same every time). A reboot helps for a short while. Another thing it does is spew massive amounts of garbage datagrams out on Wifi - it looks only pseudo-random, but it's nothing that Wireshark can decode beyond the IP layer. (IP addresses are there but looks like random public IPs.)