Normally the inaccuracies don't bother me too much. CW's Flash is the exception. Examples:

We're going to have you run in a circle, hit you with a single very fast photon, and that will open a wormhole.

Describing a world-ending blackhole's energy as some not particularly large number of teraelectron volts. This is less than a joule.

Running very fast down a building toward the ground in order to avoid getting hurt.

Ultraviolet cold vision.