pixelated is most definitely a word, and i too had issues with screen resolution. between the poor resolution and the horrible lighting, my eyes were going nuts during the PAT. to make matters worse, the refresh rate of the prometric monitor caused that nasty flickering effect.
many people will argue that you are either good at the pat, or you arent, and that there isn't much you can do about it. i partly agree. pat skills are not taught in school. it's inate. but, practice helps a ton. i have a background in drafting, and one of the first things they teach is top front end. i know that helped me.
really, it might seem like there are millions, but there are only a few general shapes. if you practice enough, you will master the details that set them apart.
and other sections, like cube counting, have tricks. every person can figure out how many cubes are painted. the hard part is going back and figuring which have 3, 5, 2 sides, etc, when you are looking at the whole stack. you always miss one. i would spend 5 minutes at the beginning of the problem going over the whole stack, cube by cube. start at the top level and work your way down. i made a list. it doesnt take long, and your focus stays on the details of the stack. then i'd just count the number of 5's, or 3's, or 2's i wrote on the paper. very quick.
it might be an obvious tip, but my method on angle ranking was to immediately rule out the 1st and 4th, which would be very obvious. then all it is analyzing 2 angles. rarely are there 3 angles that are too close. always use the scrap paper to keep track though. everytime you have to go back becuase you forgot the order, you lose valuable time.
and even though prometric is not supposed to allow it, i have friends that just traced the angles right onto the paper. it doesnt sound fair...but...oh well. i heard about it after i took my dat, and i felt a little dumb for not thinking of it. but i scarcely recall that there is some rule about not holding anything up to the monitor.
hope some of this might help...good luck