I’m guessing you are saying it is hard to believe that evolution creates incrementally greater complexity over billions of years?
Reminder that our best estimates of spacetime curvature Omega puts it very close to 1.0: the universe is very close to flat, so if the universe is indeed not spatially infinite (possible) it is at least 100s of times larger in radius than the observable universe, which contains about 10^21 stars. [1]
If the universe is spatially infinite, then all possible quantum states exist in infinite copies. So yeah, “it happened randomly” is not absurd. In fact, I find it a bit strange that any educated person would think otherwise.