I recently switched to AT&T and am much happier, but there are still occasions where my wife (on Verizon) has service but I don't. I've also heard similar anecdotes from people I've met in other parts of the country, so I don't think Oregon is the only state for which this is true.
(Before you say that this was a problem with my phone, I changed phones once while I was still on T-Mobile, and the service did not improve.)
It's all regional. There are places in America where T-Mobile is streets ahead of Verizon.
The upper Midwest, and the Gulf Coast, for example, because T-Mobile bought VoiceStream, and PrimeCo, which were dominant in those areas years ago.
Between personal and work devices, I carry AT&T, Verizon, and T-Mobile with me almost everywhere I go across America (usually two or three different states a month). Verizon is best in populated areas. T-Mobile is best in lower density places. AT&T is something of a crapshoot. Some places it's incredibly good, and some places it's like trying to make a phone call on an angry hedgehog.
Nonsense, it's not even a comparison. Tmobile is complete garbage coverage compared to Verizon or AT&T. I don't believe there is any place in the US where Tmobile has better coverage than Verizon.
All I can suggest is you get out more. And carry one of each device with you simultaneously, as I do.