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FOSS Image editor
(discuss.tchncs.de)
If it's free and open source and it's also software, it can be discussed here. Subcommunity of Technology.
This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.
You might look at Digikam. It is both a photo manager but has some editing functions. Not sure what they are.
The other one people talk about is Krita. I have not used that one. I would use GIMP myself but I hear you. Kind of understood the interface but now it has changed again so I struggle.