Honestly, I miss the golden age of streaming. But now that it’s gone and we are basically stuck with cable, I’m cancelling all my accounts, I cancelled Netflix last year, prime early this year. Never had crave, it was basically garbage since it was introduced.
See if your ISP can set their router to bridged mode, then you should be able to use your own while plugged into their equipment. It will turn all the functionality off on it so you won’t be doubled natted and traffic should flow properly.