if by perfect we mean 'cannot be improved' then the world may not be perfect as it is, as even as we speak, it is changing in ways which by some accounts at least constitute improvement or degeneration. perfect as a state precludes improvement or degeneration. however, what if the world is necessarily evolving and is doing so perfectly? unless one has some insight into the true goal of the world, and evidence that it is firmly on the tracks in its progress toward that goal, and cannot reach that goal any better than by what it is doing now, then it will be hard to say that it is perfect as far as potential for improvement is concerned.
if by perfect we mean utopia then the world is not perfect in this sense because not everyone is happy, or at least they make unfavorable comparisons between themselves and others, so as to preclude a utopia which usually caters to everyone more or less equally or so ti is typically portrayed. so even if you think such shortcomings are inevitable, the fact that history shows different periods with different magnitudes of positive vs negative experience for humans overall, means that the world as it is now cannot be a utopia unless you can show that it boasts the highest magnitude of positive human experience or contentment thus far, and that no greater magnitude is realizable in the future.
i could think of other (better) ways, that is to say more effective or thorough. like for example, just creating a blindspot in the human mind when it comes to the entire issue.What if the intention of the universe was to make humans doubt that a designer exists?
In which case, wouldn't the “countless faults” you are alluding to be a perfect way of establishing that doubt?
also if humans really were meant to doubt the existence of a creator, why do they show a striking susceptibility to believing in one? in fact, i would say even today more people believe in a creator in some form than don't, historically even more so.
the human tendency is to believe, some people have even called it a psychical archetype as if the human mind yearns for it, not to doubt, when it comes to this one.
imo, the only thing that offsets this tendency is when technology reaches a point where humans feel, and become arrogant enough, that they no longer need a creator, that is how strong the impulse is.
so if it was part of a creator's design to make us doubt their existence, the very fact we are talking about them now, and the ubiquity of the creationist theme in human religions and history, i wouldn't say they did a very good job.