To be clear, I'm definitely not saying that MacOS is now bad - it's absolutely still a pretty good OS. But, personally, I do have a couple of gripes, and my feeling is that things are changing in the opposite direction from what I would like. Compared to Linux let's say a couple of years ago - yeah, better. Compared to Windows - there's no comparison.

But, still:

- it slows down after a while

- design direction is questionable and controversial - that it got more inconsistent is factual - also, so much wasted space and everything got bigger and a little dumber

- so little control over system behavior, functionality, looks

On modern Linux, you get a more polished (wow, unbelievable thing to say - I first dabbled with Linux in 1997), robust, and infinitely more functional and customizable experience. After a while, I started feeling at home - like it's "mine" - and how distinctively MacOS feels like being a guest there, and that it was never "my environment".

I definitely realize how vague and unquantifiable most of this sounds - and how little value those things have for a lot of people - but I've come to enjoy my setup, I spend ~12h / day in it, and I discovered that how it "feels" matters to me.

stuff that annoyed me on mac was the "find" feature was useful, but to get to a enclosing folder (what I want), involved searching, clicking something, finding the file again in the display and "enclosing folder" (this might not be exact, I don't have a computer in front of me).

Sharing files with a windows hard drive. My workmate had a seagate that installed an NTFS driver on mac, which saved us a few times. Never had a problem on linux.

Python never seems to work right. Conda, and other stuff, just never worked smoothly with the bioinformatics code we were running. Cluster machines it was easy.

There is a wierd issue that you can't close a macbook and use it with an external monitor without plugging it in. It just sleeps.

Would you like to join iCloud. No really would you like to join iCloud. How about apple music? (To be fair MS is just as bad if not worse about onedrive...)

We had a pythonTK program to print labels from a CSV file. Every MacOS update broke it. We ended up just running it on a windows machine. back up was going command line on mac.

case insensitive file systems.

generally stability..

Its not bad, just seems the OS has gotten worse.

I would say the artist formerly known as OS X has never been good. It literally started its life as a half-assed NeXT attempt and has only gone downhill from there. There's still a "Services" entry in the file menu. .DS_Store files are an abomination. Mac OS thinks it knows better than I do about which software I'd like to install. Plist insanity that makes the Windows registry look pristine. GUI inconsistencies across every surface area... I'm curious what you like about it, because other than font rendering (which it does well), I can't think of anything positive.

I wouldn't even know where to begin, because the slide in quality has permeated every aspect of the operating system, from stability to design. Numerous networking bugs, SSH agent bugs, sleep state bugs, sometimes having to restart my machine because the network screws up so badly, Bluetooth issues that they keep introducing and then not fixing; I have peripherals that just no longer work due to this. I could go on and on. I could talk about the mobilization of a desktop interface (same mistake the Unity and GNOME teams made)

And I don't feel like beating a very dead horse, so just google "macOS Tahoe design issues" and take your pick.