Extremely frequent internet connection drops in Avenida España area of San Jose

Xfinity in the Avenida España area used to work very well for us, but several months ago we started getting frequent drops, mainly in the evenings. Every night, typically after 9pm, and often multiple times. Our next door neighbor has been experiencing the same thing and also a neighbor who lives around the corner. There are frequent posts about it on NextDoor.

I recently had a tech coming out and he checked our wiring and then said that he saw other very similar complaints about the evenings. He thought it sounded like a network problem, which is another department. He somehow tracked down a guy in that department who was supposedly doing some maintenance in our neighborhood, so I had a little hope. It’s gotten worse recently as of late. It drops several times a night now and I feel like it’s happening during the day more often too. 

I wonder if Xfinity has not provisioned enough capacity for this neighborhood and thus when a bunch of people start streaming, the network can't handle all the load? Or perhaps the equipment was provisioned appropriately but some of the network devices are operating in a degraded state and not working at full capacity?

I have to say I was happy with Xfinity Internet service the first few years that we had it, but in the last year or so, there are so many annoying drops that I don't think it's worth the $120 or so that I'm paying for high bandwidth that isn't available much of the time. Frankly, I'm at the point where I'm considering switching to one of the providers with much, much less advertised speed (and lower cost) in hopes of getting something that is reliable.

Does Xfinity have a way of monitoring network capacity and utilization in neighborhoods? I have to believe that there's some way to measure this and see that something is definitely not right in this neighboorhood and then they can send someone to check all the network equipment?