High ping spikes/packetloss

Hello all,

I am experiencing high ping spikes and packetloss while using our internet, and am unable to figure out a solution. I play games online, and constantly experience issues with ping going from 40 to 120, back and forth, for the entire duration I am playing. It happens in every game I play. Using pingplotter, I can also see fairly significant instances of packetloss going on at all times. Download/upload speeds work just fine, but for instances requiring consistent, stable connection like online gaming I am finding most games completely unplayable. I have gone through numerous restarts of all devices, moving the router, wired connection (though very unfeasible anyways for long term use due to layout of apartment and where we can put the router/modem), and a complete replacement of the router/modem. I am at a complete loss of what to do next. Truly, I could do with halving or even quartering our speed, as long as it was actually stable at whatever speed it was.