Your Router’s Too Old
It doesn’t matter how much you pay to have great internet; it won’t work if your router’s not up to par. Sometimes, having an outdated router is the only reason why you have slow internet. If this is your problem, there’s a quick and easy fix, albeit it’s going to cost you.
You’ll need to upgrade your router to a more recent model that supports your internet speed. It’s recommended that you look for a router that supports Wi-Fi 6E. Sure, it might be more expensive, but it’ll make your router future-proof (and you might get an even faster internet connection).