I think wolves den died because it was a simple 4v4 with no variety. The queue times + >2 min matches made it unappealing. Morale in Frontlines people would still queue frontlines because its a lot of fun and most people prefer objective base pvp over arena.
I also knew of a really dedicated and good pvper WHM who only queued in pve gear and was still topping teams with full ilvl90/100. He was R30-something. PvP gear with morale never allowed for one or two shotting. You probably got focused and didn't use your defensive cooldowns or purify the smn dots, or utility moving, or pillar/los blocking, or any number of reasons why you could have gone down super fast.