hello there, I've been struggling with this problem these weeks, and, in case you have a nvidia gpu the only thing it fixed these loading problem was downgrading the driver to 460.79 version. my game now takes like 12 seconds to load into a match, and less than 15 seconds to load the main menu. I hope this helped you or anyone else with a nvidia gpu. Also, I had stuttering problems with the game (I have a gtx1660) and the 460.79 driver completely fixed it.
oh, almost forgot. If you have problems finding a match, there's a video in youtube that shows you how to open some udp/tcp ports in windows firewall, just search for the problem and it shall work, I had that problem too, and the udp/tcp in firewall fixed it completely
sorry for my bad english, espero que les sirva amigos and may the force be with you