RAM amount? Temps? HDD or SSD?
In this case I might suggest installing RIVA tuner alongside Afterburner. Look at your in game usages in relation to physical amounts of RAM and so forth, and temps to see what's "hurting".
I can tell you now that I also play Division 2 and have a FAR better system and there are times when it makes mine cry too. This latest round of patches have been a nightmare all the way around.
As a side note, do you have Wildlands or Breakpoint? Do you have the same problems there?
In my own case, if I try to play Div2 with a dual screen monitor setup going (one screen game, one screen info) it chops like heck on my system too.