Two decade coverage issues

I have attached two screenshots here. One is of DFW airport, where I work, which includes the area where I specifically spend most of my day. It's a google maps screenshot. The signal on there has been extremely bad for many years now. Probably about at least 7 consecutive years. I can't stream anything, websites take forever to load -many times they don't even load at all-, my calls constantly break and drop. There's almost nothing I can do with my phone in this area. And no, I can't use wifi because I don't work inside the building. I work outside. I've called AT&T about it and there's never a solution or anything anyone in the company can do or even find out about it. AT&T will find it very easy to blame the problem on the fact that it's an airport where there's constant communications between airplanes and towers. However I don't have this problem in other areas of the same airport Lol. Sadly, I don't work in those other areas, so it's not like I can position myself at these other areas to be able to use my phone.

The other screenshot is of the area where I live and frequent every day. It's a specific area of Lewisville TX. The signal there is worst or none. I always have either one bar or "no service" at all, I can't stream anything, websites take forever to load -many times they don't even load at all-, my calls constantly break and drop, my messages take forever to be received. There's almost nothing I can do with my phone in this area. And using "wifi calling help" when in my apartment is worthless too, my calls constantly drop anyway. And no, I can't move. The problem in this area is a problem that has persisted for more than two decades already, and AT&T does nothing to at least find out why. According to them, as long as they see that their antennas in the area work, they have nothing to fix or investigate. Also, according to them, the problem could be because of building structures in the area, but they also say they don't know for sure. So I have to live spending hundreds of $ a month paying for service when precisely where I live and work I don't receive it. I imagine this affects a lot of people in my area, and that many have called about it, with the same frustrating results. I urge AT&T to do something about this. The truth is that even if their antennas work, their celular signal is still not getting to our devices, regardless of the phone's brand, or if our phone's are LTE, 5G capable, etc.