I don't think competence is a problem here but more of SS situation - the studio doens't know what they want from this movie. SH? Horror? Mix? I remember that SS's problem was that Ayer wanted one tone and WB wanted GOTG tone and the hybrid sucked ass.
Either way, this thing is gonna be lucky to make 300M WW. There's no way it has a WOM that pushes it to 300M dom and comparison to IT is laughable. IT is iconic. These people are obscure and this is not MCU whose brand is strong enough to turn most obscure characters into decent hits (Ant Man, wasp) or mega hits (GOTG). On top of that, it's getting released on the same day with Hobbs&Shaw and some other things. It'll be lucky to be #2 for that weekend before it falls off the cliff.