Almost certainly Ryanair.
The DUB crews who fly into NCL have a very lax attitude to safety and security. They too never check boarding cards, nor do they wait until steps are in place before opening doors, nor do they wait until signalled that it is safe to disembark before pax out the door, nor do they do anything more than the most cursory of security checks before boarding, which the ground crew are cleared to do the second the last inbound pap is off.
However, the BGY crews are totally different and are several degrees higher in their professionalism. I suspect this means that company policy on a number of matters is vastly different to the operation as demonstrated by DUB crew.
I guess some bases are just cursed with cowboy crews, who have little or no interest in anybody's safety or security, not even their own.