It’s a 3 way closet switch, when I flip it up to turn on the closet light on it turns off the kitchen light. The kitchen receptacles are cut off from power and also the kitchen fan aso gets cut off. When I flip the closet light switch down to turn off closet light the kitchen light turns on etc... The hot wire is connected to the black nut.
(click to enlarge images)
Based on a hunch from the comments, I think this is a 3-way switch that replaced a regular switch, and that the reason it is a 3-way switch is not because a 3-way switch is actually needed, but rather because the original switch had two black wires, one on a screw and the other as a backstab connection, and whoever replaced the switch assumed that the three wires (two black, one red) were from a 3-way switch and not "two wires combined together and a third wire separate".
Assuming that's the case, the two black wires should be connected together, just as the screw and backstab are internally connected together. Two ways to do that:
The key is a feature called "screw to clamp", though some manufacturers have a fancy name for it. What that lets you do is slide a straight wire under each side (top and bottom) of each screw by putting it under a clamp that is tightened when you tighten the screw. That saves the time and trouble of making the wire into a hook and it allows you to have two wires on a single screw. The picture is not 100% clear, but it looks like the existing switch may have screw to Clamp. Trim each of the black wires 1/4" and straighten and slide under the clamp, one below the screw, one above, and tighten the screw.
