Affinity Photo has a learning curve, but its a decent app. its got some memory management issues with multiple images open but I think they are fixed now.
also got into Fusion for a variety of reasons including native 3D objects, imports 3D models from most things including ProAnimator. great network rendering that works freaky good. render nodes that don’t require massive specs - i7 and 8-16gb of ram will do,  so some NUCs or mac minis work fine, even MBP’s :) will crank lots of frames out. Linux ! such a pleasure to be back in a nodal comp environment. Mostly just shut off OpenCL for more complex projects. It still renders fast for 32bit float.
I will say I have moved over to Fusion Studio and Resolve for 3D VFX and multipass EXR compositing. Very very similar to Nuke, as a node-based workflow, extremely cheap for what you get (real Prores output on PC! Easy networked rendering! Uses 100% of CPU resources! Extraordinarily fast 32 bit float linear processing!) and the workflow with Resolve puts dynamic link to shame. That said, it wouldn't be functional for big mograph projects as the layer / timeline system is not set up for that.Â
We had roughly 100 image processers, all volunteers, and was pretty good breakdown of what’s out there that makes sense to use. Photoshop did dominate, but next most popular was GIMP. However, they consistently ran into problems with things
like vector masks, support for various colorspaces and bit depth combos and overall stability when pushed hard.