Repeated 5G Gateway Failures

I've been having just about the same problem. When I had the first gateway it worked pretty well for the first several months. Then had to reboot it almost every day. So I went to the local Tmobile store and they gave me a newer gateway. And then the problems continued. Gateway says I have 4 bars on the connection. And it keeps dropping the connection. Alot of the times I'm not even getting 1mgbs of download speed. I've been on the phone with customer service several times now. Same results the run diagnostics test do this do that. Nothing has helped. The customer service is about useless. Paying for a service that barely even works now. Seriously thinking about switching providers. This is just ridiculous.