At this point, nothing Microsoft offers is open source to my knowledge. Screenshots users screens to train AI, has ads in the start menu.

Krita and Gimp are nice, so is Inkscape. Pinta on linux desktop for the MSPaint but better experience.

Things like Adobe Photoshop charge monthly subscription fees then charge you to CANCEL your subscription.

Weighing it out, Windows is spyware. Funny it advises people to switch back to 'Paint' - Thanks, ol reliable since '98?