Coding is pretty much the only way to make a site that is both flexible and fast. If you wanna stay with page builders, I'd recommend something like webflow or framer but going with these closed systems is really not that amazing longterm. You're gonna sink a lot of money into a system that will almost certainly enshittify in the future.

If you're willing to pick up coding, try to make your own theme with something like Advanced Custom Fields in wordpress or switch to something like Kirby CMS which is more flexible out of the box than wordpress and has great docs.