Question – How to implement automatic transition of animation clips in Unity Animator Controller

animator.CrossFade("State Name", fadeDuration)

will transition to the specified state without needing to set up a condition based transition in the Animator Controller so all you need to do is set up the individual states.

Otherwise, you might be interested in looking for a different animation system that doesn’t have such a tedious process for creating transitions. I can’t give any specific suggestions because advertising isn’t allowed here (except in signatures).