Well, I can understand people's general dislike of the AvP predators, but I do have a couple good things I'd like to point out.
The sterile assembly-line look to their ship, weapons, and equipment was, in my opinion, made with a lot more thought than most people give credit for.
Those yautja were Unblooded. All of their weaponry was newly made, and had not been used much, if at all.
Their gear wasn't customized because it is obvious that they only make markings and other details after their successful hunts, such as what Scar did to his helmet after successfully killing a xenomorph. That's also probably why their ship was so blank.
As for their armor, you have to bear in mind, once again, that they were Unblooded. They were going on their first real hunt, so of course they would want to gear up as much as possible to diminish the chance of failure.
Likewise, let's not forget that they were hunting xenomorphs. All that armor was probably a good preemptive attempt at making the xenomorph's acidic blood less effective. Also, xenomorphs are a lot more deadly than most humans, so more gear and protection would be expected to be needed take them down.