Not a viable solution in the US. Most ISPs operate on exclusivity agreements, and like 90% of users effectively have only a single choice of ISP for internet of a reasonable speed.
A better solution would be to have rules to make that kind of throttling illegal, but we've seen how that played out.
> 90% of users effectively have only a single choice of ISP for internet of a reasonable speed
Which is mainly because we have privatized roads here in the USA.
Yes, you read that right. The "gold standard" is underground fiber, which lies in the public right-of-way yet is 100% privately owned with no "duty to serve" like the electric utility has. Oftentimes the fiber owner doesn't even have to dig up the dirt -- if they lay fiber along a newly built highway the government does all the digging for them (to create the roadside drainage ditch). The phone company just unreels a spool of armored OS2 into the ditch and hey, it's Miller Time.
Until privatized right-of-way stops we will continue to get screwed.
[*] Transcontinental railroad right-of-ways are the exception to the above, but there's only four of them. And, frankly, that land was privatized through outright fraud. Read the book _Railroaded_ sometime, it's shocking.
or, get a better ISP? not all technical problems need a technical solution.