Sure, the cable companies are a pain to deal with, but the only real choice is to suck it up like everyone else. You’ll at least have alleviated your current issues for a few years until other options might become available.
There's absolutely nothing wrong with concentrating your transmit (send) and receive (listen) with a Yagi or Dish type antenna that covers 700mhz to 2.5ghz.
I suspect other countries phone networks must be capacity constrained in other places.
Out of curiosity, what’s your provider? If it does work where I am then I’m getting one for each device.
I think that says it all.
But with Starlink I definitely see on Friday night how we all are fighting for a traffic, and even streaming a movie becomes a challenge.