Look Voldemort wasn’t even that great of a wizard, he was just persuasive
Voldemort was deemed to be a great wizard but, in reality, he was just persuasive and managed to get a bunch of people on his side to fight against their own community.
The thing about the Harry Potter series is that when you stop and think about Lord Voldemort, you realize that he wasn’t that smart. Part of a prophecy is that you can either stop it or your actions can make it come true. We learned it from Macbeth and we learned it again in the Harry Potter series.
Still, it didn’t stop Voldemort from taking actions against this prophecy to stop the outcome. Proving that he isn’t the smartest wizard out there. And then, later, he was defeated by a teenager, proving that he also wasn’t that great of a wizard. The thing about Voldemort is just that he was able to convince people to join him and that’s his only skill.
Think about it. The Death Eaters were his power and they only were with him because of what Voldemort said to them. If he had told them they were going to come cotton candy land, they’d have believed him. Instead, he promised a world where they would be supreme and powerful and it backfired because he’s not a good wizard.
Would Voldemort have succeeded if he was a mess and not able to talk to people? Not at all because that’s the only reason he got anywhere but it is funny to think about how bad Voldemort is at just existing.