Hello, I also have the same exact problem. Once in a while I get a match with heavy packet loss, completely unplayable, then I get stuck on returning to lobby screen and have to manually quit.
I got in contact with chat support too but we didn't find any solution. I tried everything mentioned in troubleshooting and more, I'm in Italy and got a good connection, every other game works fine, no packet loss at all, ping is good.
Did a trace on other companies servers like overwatch and valorant, 0 packet loss. It happens on every Apex server I tried in Europe.
I think is something server or netcode related on EA part, because I can't find anything wrong here or in my ISP.
If it can be useful to compare, I am on Windows 10 latest update, bitdefender antivirus.
Gigabyte x570 elite MB with intel LAN, BIOS F21
AMD 3800X CPU
1080 GTX GPU
16 GB RAM 3600
NO OC