Frequent Internet Speed problems

I pay for Internet speeds of 2GB.  I routinely find my speeds are less than 1MB.   I have called in with this problem several times over the past couple years.  Technicians come out, modems get changed, but it always ends up back and this ridiculous service.  I just rebooted my modem and router.  I am attaching an image of a speed test.

In the past, I have called and after a long wait, I talk to a person who magically restores the speed to over 1GB.  But that performance is short lived and it drops down again to slug-like performance.  Everything has been checked on my end and because Xfinity has shown that they can boost the speed up to expected levels from their end, it proves there is nothing wrong on my end.

I'm tired of this happening again and again.  I pay way too much for this terrible performance.   If you can't provide the service for which I am paying, I'll switch to StarLink.