The Haunting of Hill House

I’m having a hard time getting through this series. I’m at S1:E6 and it’s a real chore to get back into it. I’m a big once-I-start-I-finish kind of person but I see myself bailing. 

For starters, I can’t reconcile the child actors with their adult versions. The children and the adult actors don’t look alike. And I can’t see Henry Thomas growing old and turning into Timothy Hutton. I know nothing about casting but I feel like they blew it.