People are way too hard on this show. First of all, you have to Suspend Disbelief, and roll with it. It's a TV show portraying time travel. that's a big ask.
I loved Lost, and I really like this show. Yes, it can be overly serious. And
the basic needs of feeding , clothing ,bathrooming these people is glossed over.
All things considered it's a fun show. Give it a chance.