Hey so I had this exact problem especially on siege it was ******g cancer I found a fix though I've been playing this game for a long *** time so I have lots of people on my friends list I think I had like 500 maybe 600 after removing all the ones I don't even talk to anymore (CLEARING MY FRIENDS LIST) it fixed the slowness i think the issue is that its trying to load to many people and it just can't handle it because everything else is fine and runs smoothly