Thanks mate, i'd like to know more if you wouldn't mind.It seems like a hard question. Are there any legal services that are close to Netflix for mainstream content? I don't think so, but it depends on your viewing tastes. Disney+ is an option, but it has different content.
I've been streaming/downloading for about 25 years now (from when download speeds made it viable) but I could never limit myself to a single legal service, so I don't. I download content and warch it in a media player.
My current setup uses a home server (a PC/device that is always on, but doesn't need to be I guess) to automatically read and download new episodes as they come out for the TV series I want, then display/view it in Plex, which is a media app for smart tvs/mobile etc. This provides a netflix type interface with episode information/series etc. There are other options to a PC for a server.
I can expand on how this works if anyone is interested. Its pretty simple to set up. If you don't have a spare device you could use a laptop or something but it would only download/let you playback episodes when it is on. With an always on device you can connect to it from anywhere at any time.
I was thinking about dumping Netflix anyway but the advert thing tipped it for me.