That's where we went wrong. Gravity stretches and compresses space/time. What we're seeing isn't necessarily an expanding Universe driven by a Big Bang... It's a pulsing, moving, stretching, and even in extreme cases possibly even knotting itself Universe. Constantly being shredded by black holes and recycled via perturbation theories virtual particle pairs...
Lather. Rinse. Repeat.
“Gravity stretches and compresses space/time”
No, matter distorts spacetime (really I think it’s just the time component that is distorted, because distorting space is nonsensical), and that distortion creates the effect we call “gravity”.