I need help figuring out the mood/feeling/meanings of this monologue: (I can tell it's a bit sarcastic)?

Puck is certainly sarcastic about Bottom and the other "rude mechanicals." But his attitude toward them doesn't define the tone of the entire speech. The first thing you need to think about is who Puck is talking to. And what does he want to communicate to that other character? Is he confessing a failure? Boasting about a success? If you read more of the scene, looking at what comes just before and just after this speech, you'll be better prepared to describe Puck's tone.