Lol. They did it just fine. Dune is a classic Top 1 sci fi novel.IMO Remaking the original (middle) without any prequel is lazy. Should have done Dune Houses (Atreides, Harkonnen & Corrino) first build some stories and background then they could have made the lazy remake (shorter likely) before launching into Messiah Empire storylines. I wish that one of the Streaming services would have picked this up and done it correctly. You can always count on Hollywood to screw something up. Hollywood cannot even get a darn comic book right. Just ask the many reboots of Batman and Spiderman...
The rest are almost unreadable (caveat: I've only read Dune, Messiah, most of Children, and some of God Emperor, so it's possible other books in the series aren't complete dreck.)
Not sure about the prequels that weren't even Frank Herbert, but this was the right movie to (re)make and if there's enough of a demand, you can always make prequels after the fact. But I couldn't imagine a more boring, nonsensical slog than to sit through movies of the rest of the Frank Herbert books. Ugh.