At this point there's just a few pieces of software that keep me on Microshitty's teat. Foobar2000 being the biggest one—there simply ain't no good alternative for Linux, and I've tried them all. Freesurround, actual dB scale volume control via Jscript, waveform seekbar, precision spectrum analyzers, modtracker player are just some of the essential plugins, as is ASIO (in addition of bypassing all OS audio stack shenanigans it has the accidental benefit of not only auto-muting , but also auto-stopping auto-playing videos on websites that might slip through uBlock).
Also, Paint.net is so good for converting .dds files. Never got .dds to work properly with Gimp.
DeaDBeeF sort of is similar but doesn't seem to have the plugins I need to do a proper full-screen 10ft GUI, Facets-like library browsing, surround upmix, DLNA streaming to other rooms etc.
I have to give Krita another try and see if it can import/export .dds, but my impression from playing with it for a few hours is that it seems to focus more on digital painting instead of photo manipulation (which modding textures essentially boils down to). I also have my GIMP workflow down to muscle memory, it only takes me minutes to do eg a recolor or upscale+fake details via sharpening and noise.