bpishkincct :
I am on wifi. The packet loss is even in the middle of the night when I am not downloading and everybody is sleeping. I know it's packet loss because my game is giving me the packet loss symbol and another game I play has packet loss % that shows if you turn it on and every 10-30 seconds my packet loss goes from 0% to 2-8%. I called my ISP and I have someone coming out saturday.
There are free phone apps out there that will help you see what your WiFi quality is like. It could be that your PS4 is just a WiFi shadow and not getting a good signal. Even moving it a couple feet to the left or right might help (or not). Play with it some and see. If you are stuck with WiFi, you might consider a WiFi range extender (booster) or mesh network, but I would also look into powerline networking or my preference, Ethernet (yes, you might have to crawl in the attic a bit).
** PS .. your ISP is mostly concerned about the signal at "the box". Past that is generally your problem. Since other devices seem to work fine, the signal at "the box" is probably fine. Maybe you have the world's nicest ISP and they help you out, but don't be shocked if they say the signal at "the box" is fine and shrug.