Kibbitzer, I think your feet are just fine. In fact, the feet in the tutorial that Elf-Cat shared are very unappealing in my opinion. There's no variation in line or anything that suggests an appealing form. Even though he goes into more detail about bone structure and the like, I don't think any of that comes out in any of their drawings. Speaking as a person who doesn't mind feet and actually finds them kind of cute, yours have immense appeal and are not at all gross. For most people, I think they already find feet to be gross in their own right, so you keep doing what you're doing and you'll be fine. Didn't mean to go on a whole diatribe here, but, well, it's one of the most viewed pieces on DA at the moment, so there you go
Lovely work!