Globies BTFO

You're referring to geostationary orbit - if there is anything up there it's more likely floating using a weather balloon rather than orbiting at perfect speed with the earth.

Weather balloons won't float above the atmosphere.

Do they need to?

So how do flat earthers explain the Coriolis effect?

The Coriolis effect doesn't even make sense on a sphere. A hurricane in North America will be subject to the same direction of spin than in South America.

People also like to point to toilets flushing in a different direction in the Southern hemisphere compared to the Northern hemisphere, but this is a myth and is just due to the design of the toilets.

Bullets

youtube.com/watch?v=jX7dcl_ERNs

This is actually debunked by the globe model. The gun will also be rotating with the earth (as well as the target) so it doesn't make a difference.