Wasn't able to watch anything more than the first game against Wario, TKila, but I plan to at a later time. About to leave for a pre-tournament smashfest soon.
Here's a few things I noticed, though:
You're landing too predictably right next to him. Throwing nairs against opponents' shields are only going to get you punished, if you're predictable.
Running directly at Wario is usually a bad idea. I saw a lot of dashing fsmash/grabs. Very rarely will you be able to punish Wario with one of these. It's a sign of desperation, and Wario is able to take advantage of them really, really easily. Instead, focus on keeping your spacing down. Don't jump to throw pikmin if you're already really close to him, because then you commit to having to land right next to him, and as I said, that's a terrible thing to have to do.
Don't f/b/uthrow that often unless you're desperate for space or are going for a kill. ESPECIALLY upthrow. Save it for kills, as it's your best kill throw with purple and blue pikmin (BACK AND FORWARD BLUE THROWS ARE NOT AS GOOD). Keep your upthrow fresh for when you're going for a kill. Save your forward and back throws for when dthrow isn't useful anymore. That's usually not until around 80%. Up until then, use dthrow solely for combos. It puts them in a terrible spot to where they have to react immediately or their landing gets punished. Take advantage of that. Watch their landing habits and plan ahead for how you're going to punish their patterns.
You don't up air very often. It's extremely good against Wario. And most characters, actually XD Up Smash Out of Shield is something else that you definitely want to learn for this matchup. So much of his shield pressure isn't safe if you have it down.
If a tier is bouncing right above you, don't throw out an up smash. The two attacks will cover the same area, and the opponent will only get hit by one regardless. If you want to throw out another hitbox, use dsmash. That way you have a hitbox above you (the tire) and two hitboxes at your sides. If the tire is bouncing between you and Wario, be patient and wait to see what he does. Either he commits to something to get past it that you can punish (air dodge through, backs off and lands, uses an attack to cancel it out), or he gets hit by it and you can punish.
That's one of the main things I'm noticing, actually. You aren't patient. You throw out hitboxes constantly, which is good at times. I do the same thing a lot. But you have to be predictive with your hitboxes. You have to throw them out where you think the opponent is going to go, not just guess. Also, waiting and letting them make the first move is a good thing, a lot of the time. If you have good spacing, wait for them to commit and punish it with grabs, fsmash, etc.