There is no reason that the universe should be designed for our convenience.
Apparently, a great deal of dark, unseen material exists, whose gravitational pull is responsible for the motions of the stars and galaxies that we see.
There was no "before" the beginning of our universe, because once upon a time there was no time.
Once upon a time when there was no time.
We can predict the present without having to know everything about the past.
When we try to observe things that are very small, the act of observation itself will significantly disturb the state we are seeking to measure.