GIMP and photoshop have always been photo editing tools first and foremost
I mean, GIMP literally means “General Image Manipulation Program”.
Excusing the lack of proper shape drawing tools as “it’s a task for vector software” while at the same time having things like the ability to define vector masks is complete nonsense.
Though I understand your 4 point (and one point I was chewed here in Lemmy for pointing something like that on an opensource community), and I don’t know this Delta app, what features would be missing from WhatsApp? Maybe video calls for sure, but I’d think stuff like “statuses”, “channels” or this ai shit aren’t really needed to communicate with someone