Still, I feel like a subscription is a service-as-a-software-substitute [1]. At least when I don't need continuous development.
There are plenty of free and open-source programs. I have gotten by with Gimp for a lot of my needs. There is also Krita and darktable, and even the browser-based miniPaint [2].
[1] - https://www.gnu.org/philosophy/who-does-that-server-really-s...