Spaces, utilize them. That wall of text hurt my eyes.
I'm also a long time customer and the reality is loyalty to a company is meaningless. This isn't a utility company, you have options to pick a provider. Rep probably didn't care because they don't get paid enough to care. It's a thankless position.
Personally wouldn't blame them. My time is more valuable than wasting it to be irate at strangers in another state. AT&T would be your next big carrier.
PS: A rep isn't responsible for where you live or what coverage you get. If you had good coverage before and not now, time to move on. That's a better use of time than expecting a miracle in a poor overly congested area.