Yeah, the brush-out: definitely *not* sleek. Definitely a tousled, messy, wavy thing.
If you don't like the poof that the brush out gives, then I'd recommend maintaining pretty low expectations for the sea salt method. It's typically a bit drying, and definitely embiggens my hair in an even more non-sleek way.
I also gave up on any sort of sleekness. Years ago. And now I really like my messy, eternally frizzy, Very Large Hair. I think, once I stopped trying to force it to have a texture that was *never* going to happen routinely outside of a salon blowout,I had no remaining reason to be frustrated.