Bad internet for whole neighborhood for years

Everybody in our neighborhood has been having the same problem, and that’s bad internet. We can’t just switch internet providers either because xfinity is the only company that reaches out to our neighborhood. I like to play games a lot and I will get ping spikes every 5 - 10 seconds. Sometimes the WiFi will even just stop working for a couple of minutes. Keep in mind this isn’t just me it’s most of our neighborhood that has this problem. I have tried literally everything and when I say everything I mean EVERYTHING. I’ve had countless xfinity employees come to my house and do different stuff to the internet but no one ever really fixed the problem. We just had one guy come over and gave us a new router that fixed the problem temporarily but it’s been a week since he came and it’s back to bad internet. I thought I would try posting on this to see if I could get some help. So please if you can help. I would appreciate that very much.