The way Windows runs the hardware specifically for laptops is what I don't like about it. Not the hardware itself. When you are unplugged away from ACs, the laptop's hardware throttles to save energy. And I've found throughout my computer history that Windows, much quicker than MacOS, loses battery life with the more applications you install. The same is true for Mac, but in my experience, to a lesser degree. You may say the opposite is true for you, but these are just from my experiences.
Another thing I don't like about it is that you can have an insanely attractive, beautiful, small little laptop that has a good graphics card, processor, screen, etc. But there isn't a single PC Manufacturer that has an attractive, sleek, portable AC Adapter for anything outside of a couple ultrabooks so you have to package those generic, gigantic black bricks. This ruins the point of a portable computer for me.
Not only that, I just find that when I do configure and find laptops that I am interested in (Razer Book 14, Dell XPS 17, etc.) they tend to be extremely expensive, moreso than Mac hardware nowadays and lacking in the details I just mentioned. We'll see if the same is true when the newest MacBook Pros get released and what those are priced at.
I love Windows on my XPS 15 when plugged in. It does everything I want when I'm in desktop mode. In fact, if I had a choice between a Windows desktop and a Mac desktop, I'd go PC everytime. But for laptops... I'm done with PCs.