service interruption

I have been a loyal cricket customer for a decade and I live in the fastest growing city in the country.   Why has service dropped or totally disappeared in the last few months.   Where I used to get 3 and 4 bars I now only get 1 or 2 if I get any.   In a major metropolitan area service should be getting better.   I understand that cricket is upgrading the system to 5g but that should not reduce 4g coverage.  Customer service is dismissive the only saving grace cricket has right now is it's local representatives.  Even still if I cannot get better service I will have to change carriers.  Let's see if cricket corporate responds to this because I am getting the run-around when I call customer service.