> No, they're not as good as Adobe software, but maybe that's less important to you than not paying Adobe.
On the Mac at least, some of the alternatives to Adobe are better for the vast majority of users and aren't on a subscription model.
For example, Affinity has a universal license for $99 where you own Publisher, Designer and Photo for macOS, Windows and iPadOS. This is like being able to buy Photoshop, Illustrator and InDesign from Adobe without a subscription [1]:
Experience the full power of Version 2 of Affinity apps with the
Universal License. For just one discounted payment, you can get the
ENTIRE Affinity suite (including Publisher for iPad!) on all your
devices, across macOS, Windows and iPadOS.
If you only need one app and not the entire suite, you can do that.
Acorn [2] is a great image editor for macOS that takes much better advantage of the Mac platform than anything Adobe has recently put out. Unlike Adobe, this indie developer doesn't have to make a UI/UX experience that both works on macOS and Windows. It can do much of what other image editors can do, in addition to being programable with AppleScript or JavaScript. The UI is much easier to use than most other mid to high level image editors.
I've been a customer for years because the support is great and the upgrades have always been reasonably priced. A license for Acorn is $40.
OmniGroup provides the best of both worlds with all of its macOS, iOS and iPadOS software: you can purchase a license, pay a monthly subscription or add a web subscription [3].
[1]: https://affinity.serif.com/en-us/
[2]: https://flyingmeat.com/acorn/
[3]: https://support.omnigroup.com/buying-mac-apps/