To recap what I’ve said previously, the Jedi Order didn’t fall because of Anakin, it fell because of Sidious, and leaving Anakin on Tatooine would have done absolutely nothing to stop it. The plan that led to the massacre and fall of the Jedi Order was Order 66, and that was already in motion before Qui-Gon even met Anakin. The clones had already been ordered and I’m pretty sure were in early production, the war that would bring them onto the field was being kick-started, and the political set-up that would put a Sith Lord in charge of the Galactic Senate was about five minutes away. Nothing Anakin does later really adds OR takes away from that. It’s all already moving, and it will come to fruition with no input whatsoever from Anakin Skywalker. Vader was a bonus for Sidious. He was not in any way integral to the plan.

The mistake the Order made that led to their annihilation was accepting a booby-trapped slave army and being willing to lead them into battle. Their half-assed political involvement and casual acceptance of slavery was what damned them. Anakin and his fall was incidental and symptomatic of the root cause of their demise.

The main thing Anakin does in the prequel trilogy that has real impact on the fate of the galaxy is father Luke and Leia. That’s honestly about it.