I think GIMP would be a better comparison than paint.NET, as it has a huge feature set.
I guess most people choose Photoshop for its ease of use and because of familiarity - it's generally used in arts and design schools, so most students know it, whereas Gimp requires a new learning curve - including learning about its existence in the first place.
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
I think GIMP would be a better comparison than paint.NET, as it has a huge feature set.
I guess most people choose Photoshop for its ease of use and because of familiarity - it's generally used in arts and design schools, so most students know it, whereas Gimp requires a new learning curve - including learning about its existence in the first place.