That's absolutely true, and the part many people don't get about evolution. It isn't a ladder that species climb, it's random chaos. Some changes are good, some are bad, and some don't matter either way. The best possible humans might have died in a famine a thousand years ago and we are the worst case scenario. Evolution has no goal or agenda. It's just recording how things change over time. We breed dogs for certain traits, which is basically us controlling evolution, and we have a lot of useless breeds of dogs to show for it.