My rig is nice. But during Destiny 2 and Fortnite, when playing with other users on a team or squad I find it lags like crazy. I know it’s not my internet as it does this while I have friends over for LAN parties as well and they don’t experience anything like this. My set up:
i7-7700k
gskill 16gb-3200mhz
asus mark 1 z270 mobo
evga ftw3 1080ti
corsair 1200i psu
samsung SSD main boot
WD Black 1TB Games and stuff
2 asus 28” 4k @60hz monitors, game on one stream on the other (lag happens whether I’m streaming or not)