there's a difference between legit plot holes and "plot holes" made up by someone who clearly went into the movie intending to hate it
How about this plot hole? They never said why Luke was so important and why they needed to find him.
Also why do they only shoot young Darth Vader once, why not just keep shooting him. It was like they were like ok, we shot you once, let me put this gun down.
luke is the last jedi and most powerful known force user in the galaxy
oh and he's also leia's brother
they shot him, probably assumed he was dead because of how powerful the gun is. then they had to deal with all the stormtroopers rushing to kill them then they had to get out of a collapsing building. but yes, they should have stood out in the open and unloaded clips into him.
with all honestly do you REALLY not understand this stuff? this isnt even star wars stuff, these are common things that happen in all movies. if this was john carter and not starwars you wouldnt even have these minor pointless problems