>>8824013It varies but issues like this are pretty straightforward:
ISPs string lines too long
After a certain point, this causes interference on the line
So let's say you have a DSL cable that can only be about a thousand ft long and remain stable. They'll string a thousand ft on one side of the street, then instead of laying down a new cable, they'll just extend it another 1500 ft to cover the other side of the street. Everything past the first 1000 will get increasingly unstable as resistance in the cables cause interference, but your ISP will sell you a service to use that line as though there's no issue, then do everything possible to lie about the fact that they chose to install the infrastructure incorrectly because it was marginally cheaper for them and have absolutely no intention of ever delivering usable internet. And yes, selling a service that offers specific speeds/performance on a line that literally cannot deliver it is not legal. They just do it anyways.
They get away with this because old boomers don't notice when their web page takes 3x as long to load or their internet randomly goes down every few minutes. It's mostly apparent when watching videos, playing online games, streaming or downloading large files.