>they can see your web history and network connection history.
>probably know about steam
>probably know pirating websites
Most ISPs have a provision that says they will not monitor "normal usage" unless asked by authorities. It would violate their own terms. If you do not actually use a chunk of bandwidth, you shouldn't be noticed.
Now, in an HTTPS connection, the most data the ISP can see is what host is the data going to and from, but that's about it.