>The only thing worse are the windows computers, which are in such bad shape that they just stopped using them.
Sounds like they are old and haven't been maintained properly.
I have experience with small (~200) and large (~6,000) professionally maintained Windows installations. They operate like a finely tuned engine, allowing you to focus on your core work.
And that's the key. There are hacks who call themselves "IT" and there are true IT folks who have the training and knowledge to do things right the first time around.
Prior to my first experience with professionally managed Windows installations I had completely ignored that entire world. We built our own computers --save laptops-- and every installation, save the initial image, was locally managed by the engineer running that machine. Works great. No question about it.
From experience with 20~30 machine installations, I can't remember a single serious issue in, say, 20+ years other than a hard drive failure. No real hardware failures outside of that. No viruses or any such problems in, again, 20+ years and multiple generations of OS and hardware. The key, I'll guess, is to buy good hardware and install good software.
And so, when I read accounts that describe nightmares I have to wonder what people might be doing. I don't understand it at all. I've been using PC's since the very original IBM PC and I can't remember a nightmare scenario, ever.
As for Mac's and iPads. I've had experience with ~200 seat Mac installations. They have the same issues PC's might have. The only "nightmare" I could point out is that, generally speaking, Mac users are utterly clueless. This excludes developers, of course. I saw IT burn time with the dumbest issues, whereas the PC users in the same business (about 200 as well) really only consumed IT time when there were hardware or software installation issues for the most part.
iPad's? I consider them to be useless for but a narrow set of business or educational applications. Cash register? Sure. Authoring documents and doing heavy web work? Nope. In general terms I am pretty down on tablets. I think they've manage to ruin desktop software. The transition of something like Skype from a computer-class application to mobile-first turned the program into a circus act that uses 10x more screen space for everything. Touch, as far as I am concerned, for business and other applications, is bullshit.
Chromebook is a far better choice, one that is easy to manage and deploy.