If it is . . . you've got Anstor giving an emotional reaction that's way over what most readers would give, at least based on the experience so far (which is nothing, since you just started the story). OSC advises you don't have your MC feel something unwarranted -- it distances us from MC, which is the last thing you'd probably want!

Also, give us WHAT the emotional response is about BEFORE we see it, so we're not in effect staring at MC and wondering what he's upset about (because the explanation comes later).

I think it's dangerous to start with someone being frustrated with reading -- readers are suggestible, and you may get them to feel the same way and put down the book! But you may get by with it.

I don't think describing how the files hung in the air adds much when it comes to hooking me.

I also don't understand why a recently promoted mid-level worker thinks the CIA is wasting his time having him do something that only he can do. Maybe this could be clearer.

Just my cents--from a beginner at that.

I normally don't take such liberties with other people's work, but maybe an alternate opening will help you see where I'm coming from.

The system was breaking apart. How else could Anstor explain being whisked past two security fences, badge checks, and what should have been over a year of clearance paperwork--only to have the CIA hand him another pile of paperwork? For proofreading. The words blurred before his tired eyes as the steady thrum of rain against the window seemed to tick the time. He shoved a stack of folders off his desk in disgust.

No, this was one assignment he had to see to completion. Ignoring his groaning knees, he lowered himself to the floor to collect the files.

Notice that the theme of the intro is in the first sentence--something has caused the CIA to break its normal protocol. Our interest is enhanced when we learn that the assignment seems unimportant. Why all the trouble? Yet, we realize by the second paragraph, Anstor also realizes what he's doing is necessary (he just doesn't agree that he should have to be the one to do it). All these things I gleaned from your openings, but notice how we never leave Anstor's POV. Everything we learn about the situation, it is reasonable for him to be thinking about at the time. We don't hear a narrator tell us, we hear Anstor. And instead of first seeing a reaction to the situation from a character we know nothing about, we learn why the situation is so frustrating. When Anstor reacts, we are right with him.

Is this your first novel? I think my style qualms are common for beginners. I know, looking back at my older stuff, it had a lot of the same problems! My advice? Just keep writing. Get the whole thing down. And keep reading! As much as you can by authors whose style you enjoy. I'll bet that by the time you get half way through this piece you'll be looking back at your beginning stuff with new eyes. (But, if your anything like me, you shouldn't bog yourself down with rewrites until the whole thing is down. I make that mistake all the time, and it causes me to become frustrated and lose interest in the story.)

Anyway, hope I've helped.