yes, hybrids aren’t easy to play. They have less Hp than warriors, they have less armour, they deal less melee damage. However they make up for it with heals, small magic damage, and buff/debuf. Most importantly they can corrupt which is the only way in MO to almost guarantee a kill if used properly. There is no other spell that prevents people from healing in this game. And when you have to contend with bandages, heals, pipes, potions it can be very hard to finish a competent enemy without corrupt. The higher the pvp skill level the more clutch corrupt becomes.
hybrids are not front line fighters, they usually go after mages and help with finishing off people. They hit and run. They bait and bunt, but most importantly they stay alive because they are so versatile. And once the enemy gets low they swoop in for the corrupt and the kill. They are not masters of anything in particular, buck jackals for all to fear.