is it still targeted?

if ur opponent activates a card that says negate effece of a card that targets this monster or 1 monster, then lightning vortex mirror force and dark hole still destroys them because its targeting all monsters and not 1 specific monster

Dark Hole, Mirror Force, and Lightning Vortex don't target. Ever.

If what you're asking is if they can destroy only a single monster, then the answer is yes. What would make you think otherwise? If something says to destroy all monsters on the field, then it destroys all monsters on the field, regardless of number.

all 3 of these hit the field, it doesnt target the monster on the field, they do not target

no. these do not target specific monsters. they destroy all monsters that meet their conditions.