You had done your rear brakes recently...correct? Trying to remember.On my mobile at the moment.Asking because if there are new pads then your parking brake shouldn't be all that loose.If it is real easy to pull up,then the cables are worn.Meaning they are stretched.This happens much more often on cars where people muscle the E-brake up super high.This is how they get worn out so easily.On a non-worn out unit,the e-brake handle only needs to be pulled up about a quarter of the way.No more,unless the pads are excessively worn down..As for adjustment,the E-brake is self adjusting.The tension is adjusted inside the parking brake assembly.It's spring loaded so dont remove it unless you put a screw or something through a hole at the top to prevent it from unloading.There is also a cable equalizer underneath that divides the tension between the two sides.This can be removed but I dont think is adjustable.
Your only bet for reclaiming the super tight tension would be replacing the brake cables.And that's just a royal PAIN IN THE ASS!