Anyone's Home Internet App not loading?

I’m of the opinion this app is pretty much garbage.

I've been using the T-mobile 5-G internet for about 6 months now and I have the KVD21 model router. The internet works well, however lately I am getting some lag waiting for pages to load. I have the app installed on a iPhone 13 and it hardly ever works. It just spins and spins. I used to be able to delete the app and reinstall and then it would work, but the last time it seriously broke something and I didn't think I'd ever get connected to the router again. Finally after turning off my phone a couple of times and rebooting the router my phone has wifi again I'm sort of afraid of this app now and may just go back to Comcast. Which is a real shame as I did want this to work out.

I just don’t understand how such a fine company as T-mobile can roll out this garbage.