5G Internet Showing Incorrect Location

We recently switched from Verizon Wireless to T-Mobile looking to take advantage of the great TM cell plans and low-cost 5G internet. Thankfully I didn't cancel our current ISP (Wow! Internet) because the TM Gateway was a total headache for us and I've just canceled that service. 

The first issue we noticed is what's been discussed here: the location issues. We use HULU (Live) and it kept giving us the "It looks like you're not at home" message when we opened the app on our AppleTV. After an hourlong call with HULU I find out it's likely due to TM using a dynamic IP address, rather than a static one. The person at HULU said she would reset our location change limit (which is 4 location changes per year) because they are aware of the issue. I'm sure we could continue to call them to get it reset again but who the heck wants to keep having to do that regularly?

I spoke to TM tech Dept and they told me there's no way to set the IP to static with the Gateway router. They suggested getting a third-party router, switch or Smart extender that would allow us to set a static IP address for our devices to work off of. I asked if having a second router would slow down the speed - he said it wouldn't - if anything it would extend the range. He couldn't recommend a specific device or brand so I tried calling Best Buy (really the only option I know for this kind of question) but they were of no use -- the "Geek Squad" chat told me to call BB customer service, who then told me I should call Geek Squad, who transferred me back to CS again! Each time I'd have to explain the mouthful of a question. This went on for 40 minutes! 5-6 transfers until they finally "accidentally" disconnected my call. So, then we went to the brick & mortar Best Buy -- they were just as bad. It took them over 20 minutes to get someone to even acknowledge us, even after requesting assistance twice. Anyway, when we finally got someone to help us, he told us the TM Gateway is basically a "mobile hotspot" (which I'm sure is great if you're on the road in an RV), and the idea of using the second router or switch didn't make sense. So, I guess that's that. 

The second issue is the quality of the internet. I had no issues while on my computer but my son, who's a gamer, said his game was "laggy and unplayable" -- he was very frustrated and eventually went back to the old router via ethernet.

I was really hoping the TM internet would work out for us but, until they find a workaround for the IP location issues, we will have to use another ISP.  Bummer.