Horrible AT&T cell Coverage

We live in north Naples, Florida...34110, west of US-41 and south of Wiggins Pass Rd.  The cell phone coverage is pathetic.  I guess we could buy an AT&T signal booster, but that won't help us when we leave our home.  In the house, we can fairly successfully use Wi-Fi assist to make calls.  As soon as we get in our cars, we have a large area near our home that has very poor coverage.  We constantly have dropped calls and/or poor voice and video quality.  We have numerous devices and have been with AT&T for many years--we hate to leave AT&T, but will do so if that's the only solution.  The AT&T coverage map shows 5G coverage for our area, but that simply not accurate, at least not in any reliable way.  Our only current solution outside the home is to use T-Mobile hot spots.  Seems fairly ridiculous for AT&T customers.  Suggestions?