I think you are playing the wrong game my dude, L2 is all about the strong trampling on the weak and the weak trying to become the strong. Admins don't care about it and they shouldn't care either because that's the nature of the game. This is the reason they take no action against stunners in EV/ABG, this is all in the game, it has been for a long time. This game is very competitive, being a jerk doesn't mean anything, PKing everyone just for the fun of it is in the game. Official classic servers tried to make it harder with stupid sin eater quests but it doesn't make sense, PKing is a part of the game, the frustration you feel after your whole party is PK'd is one of the essential parts of the game, and this is proof that the game is way more competitive than your average MMO. This is also the point of classic, trying to emulate the old lineage 2 experience. It was always about the who is more dedicated to the game(dedication as in time spent or money spent). The high levels who use those bosses as a means to powerleveling have earned this because of their dedication and they have also earned the right to take them from newbies. Dick move or not, it doesn't matter, the game is designed for people to be assholes.
EDIT: To make myself clear, I agree that the debuffs during dueling should be fixed(albeit them not being bugs). But the rest of the stuff about people not being able to solo raidbosses is stupid, get over it, there's not that many autists in the server either who actually bother doing this stuff.