ISP throttling

Pay them more.

>>58052075
>implying
stop paying them, say you aren't getting your service.

If they cut off your connection, class action lawsuit

If on wifi: change channels on the router, there may be too many wifi APs in your area using the same channel.

If on ethernet: check how many people are connected and if they're using bandwidth or not. Also check windows's "resource monitor" and check if any programs are eating internet bandwidth and either uninstall them or block internet connections through your firewall.

>>58052085
Good luck with that.
You probably want to read the terms and conditions of your plan.

There are tools to detect it.

Use glasnost.

>>58052116
maybe he has a business line