Time will tell, unhappy guy. Yes, he might get mad and tell you not to let the door hit you in the posterior on the way out--or maybe he will realize the frustrations his approach causes and make adjustments. Either way, I think, as you say, you are seeing it is risky to complain to fellow workers too much, especially in a public area. And, it is too early to know the politics of this company, so you won't know who to trust in sharing your concerns and who will immediately blab to the boss. And it is best to politely share your concerns with the person who is causing them, in general.

Let's trust that if this job is meant for you, then you will not lose it. Otherwise.......

Let us know how it goes. It sounds like you have learned an important lesson regardless.