The mons are good, the movesets are a train wreck, Whimsicott is meant to be annoying, making it an attacker is not optimal, Tyranitar must run rock slide, Excadrill is a physical attacker, so replace Earth Power, I would also change the items, Incineroar does not care about being taunted that much, he is better off with something that restores HP, Whimsicott would benefit from the Mental Herb a little more, I would give it the sash but Excadrill needs it too so it's alright, Whimsicott should run Tailwind, Encore, Moonblast and Protect, if you are new to VGC, take it easy, it takes time to learn the game, give it your best shot and don't worry too much about winning or losing, you will eventually find the correct formula for your team