Fall damage doesn’t correlate with high ping. Ping can be affected by so many things. Have you tried plugging in directly to your router and see if that fixes anything? To me it sounds like you have a weak connection to your wi-fi. Maybe try moving your router closer to your setup and see if that fixes anything. Dealing with high ping is annoying and frustrating, but i’m sure you will figure it out. If there was damage it would either work or not, no really in-between. You could try opening it and unplug and plug in the wifi antenna cable.