Crooked light switches in loose electrical box needs fixing
OK, Those tabs are not up against the drywall. Press the switches in hard until the tabs are against the drywall and then tighten the screws. Then get a two gang switch cover with the four screws that will aid in getting the switches lined up correctly. You can loosen the screws holding the switches to the box a bit if it helps line them up with the new cover. That cover plate you have is useless.