Package Loss Only in Ranked Games

I am playing on Steam-PC. I am encountering package-loss issues really frequently (like 2 out of 3 matches) in ranked mode, and the package loss will remain for the entire game, staying at a level usually above 50%, and this is not playable for me. I have never encountered such situation in other modes (wildcard, firing range, unranked), thus I'd assume that it's something to do with the connection to the (explicitly) ranked servers. I also have never encountered such situation in other games (CS2, PUBG, etc.). I have a stable internet, and I am using a Xfinity service (if that helps).