why TMobile home internet so bad

I hate to say it but I'm in the same situation. They convinced me to leave spectrum and use them and they said it would be cheaper and much better, it's absolutely garbage. Everything we use has to buffer. I can't believe the company would put their reputation on the line by doing this. They are clearly chopping the internet or doing something.

How can one of the phone companies that has the best Nationwide coverage have the world's worst internet. How can I have amazing phone service and connection but have terrible internet? This is not right and a lot of people are going to leave this company if this doesn't stop.