Does anyone know if there is a way to block posts and comments made by certain people so I...

Go to their profile and there's a block option which should be located in a very obvious spot

As far as I know, currently there is no such thing. The "block" option right now only blocks the person from replying or messaging you. Basically they can't interact directly with you. But you will still see all their daily activities, comments, posts etc. I know, it sucks. But better than nothing.

Thanks.