Permabanned
Steam it is optional.
My ps4 pro throttles to about 20mbit/sec if a game is running, not to dialup speeds.
Its even worse then I typed actually, its 200kbit/sec, it goes down to, so about 4x dialup speed. (I thought was 200-400kByte).
Think they are all optional/configurable but believe its the default behaviour for most of them.
But yeah, something wrong with yours.