For those saying Flash is doing poorly because of Multiverse and Superhero burnout...the #1 movie (in it's FOURTH WEEK of release) is Spiderman: Across the Spider-Verse. Which is all multiverse, and all superhero. It's made $560M on a budget of $100M. And it beat not just Flash, but Pixar's latest (Elemental) and the tail end of the latest Transformers movie and Little Mermaid. Doesn't seem like people are waiting for streaming on it, despite it being animated.
Doesn't seem like people are burned out on multiverse or comic books so much as they don't like The Flash.
Spiderverse is more the exception now along GotG which is really the last gasp of phase 3.
Lots of underwhelming superhero movies last couple of years and 5 or so underwhelming "blockbusters".
DC is absolute shambles, MCU bit better off but way down.