Piracy is the only stable platform for this. I’m constantly moving between services following the “seasons” of the things I like rather than continuing to pay during the droughts.
It used to be Netflix though. Back when they were one of the only streaming services and had a way bigger back catalogue of syndicated shows.
The worst is Paramount +. They absconded all the Star Trek there, and the service has literally never actually worked for me to watch anything on it, so I end up pirating Discovery, Picard and Lower Decks anyway.