First off, before complaining things are too hard, examine your tactics. I've seen countless times where the players did not work together in combat, rather each running to the enemy to showboat their kewl powaz with no plan whatsoever.
And heaven forbid they give up a few initiative ticks so the party acts as a cohesive unit. I just love it when Mr. Improved Initiative rolls higher than the rest of his party combined and rushes out there to get his beloved sneak attack, only to be torn apart in the mid teens of the initiative cycle.
If players fail to operate as a well oil combat machine, sometimes the mooks supply the [flaming] oil.