why is T-Mobile's website so slow?

I have the same question as the original poster. I have tried to log into the T-Mobile website in order to pay my bill every day for the past three days and the magenta screen just hangs tight for eternity, even though I am accessing via broadband. No other website on the Internet is this bad. It usually takes me more than one try to finally be able to log in, but this is the first month when the third time has not been the charm so the strain on the system has definitely gotten worse since the Sprint merger. Will you please use some of that money to upgrade your website?

I am sure the interest off of the revenue from millions of customers paying you a few days earlier would more than offset the cost of investing in your infrastructure.

And before you suggest I change my behavior, I do not want to set up AutoPay or go into a store or pay by phone. I want to use a simple online account like any company should be able to deliver in 2021. Thanks in advance from a long-time customer.