Odd. I didn’t like interstellar either, but time dilation in the vicinity of a supermassive black hole is way, way less controversial than being able to build a wormhole large enough for a ship to get through.

Possibly you’re confusing stellar mass black holes and super massive black holes?

Time dilation doesn’t only occur at high velocities, so your link focusing entirely on velocity is accurate, but I think not really relevant.

The physics was pretty reasonable for the time dilation. Possibly off by an order of magnitude or so, but not ridiculous on its face.

Except for the wormhole.