why does T-Mobile suck

I switched from at&t to tmobile seven years ago because I could not get a signal at my new home with my at*t phone. Tmobile assured me that I was within their coverage area. Nope. Received two new phones, one for me and one for the wife and from day one we've never been able to get even one bar outside or inside our home. Their solution was to send me a cell booster. The problem with that is it is connected to the Internet so if your Internet goes out (which is quite often around here) then you are just sol. The other issue is the cell booster is one big pita trying to get it back up and running after an Internet outage or a power outage. In seven years I bet I have contacted tmobile support a million times. Two days ago I contacted them again and they connected me with a "supervisor" who rather bluntly told me there's nothing they can do. Period. Hogwash!! And it's not like any of the other carriers are any better or I would have already switched. This time is different. That snotty attitude from this "supervisor" really set me off. Now watch them try to jack me up with all kinds of different "fees" when I try to switch. I just don't get it. They don't even try to be helpful or friendly. It's like having cell service through the mafia.