Funny how in every MMO I see the DPS class is the one that gets the heat of the nerf Nerd rage.
when Diablo 3 came out it was that the Demon Hunter was OMG NERF! DPS HAX and that Barbarians really needed a buff, and it turns out Barbs could efficiently solo the end game of D3 without breaking a sweat. while the now Nerfed Demon Hunter still gets 1hko but now has a lot less DPS to go with it. (just using this as an example,)
It is not that surprising tho that the average joe who comes in PvP without much knowledge would notice the DPS characters first, they come in lacking equipment, or knowledge to counter a Mara for that matter , and would just rather flame in the forums, than figuring out what to do against a Mara..
A well timed CC would destroy a Mara, Specially in groups, but you probably are too busy mashing up the keyboards, pressing all the hotkeys at the same time when up against a Marauder , Instead of figuring out when to use what skill,
and if you rather run around alone in PvP warzones than sticking with the OP Group chances are a Mara will take you down. ( I mean thats the whole purpose of a Marauder )
As for Defensive skills, they do have a cooldown, a smart or slightly knowledgeable Marauder would never jump into a fight with the defensive skills still on cooldown, that is when you usually see those Maruaders running around outside the " hotzones " but ofcourse while they are waiting for the cooldowns, you guys are too busy trying to kill the Toon infront of you like a racing horse with Blinders, by the time you decide to go after the Marauder, they have all the cooldowns ready.