nobody cares about how 'harrrd' you are, and youll find that 99% of the people on a pixel board disagree that 'better' art can be made with photoshop brushes.
as far as ms paint goes, the most frustrating thing that i find is that you need to leave what you are working on and clikc on the palette (or worse, use the eyedropper tool) every time you want to change the active colors. Other programs allow you to simply right-click on the color in the image to change the active color. Paint also only stores 3 history states; i must prefer the 1000 that a program like IDraw offers (or 2000 in photoshop, although i dont use photoshop as much). other programs also have in-file animation schemes, so that you can preview your entire sheet in action in real time.
sure none of these features that other programs have are needed to make pixel art, but they definately make it faster, which means that if i spend 2 hours on a piece in IDraw, the ratio of creative effort to work effort is a bit better than an unfamiliar but good program like ProMotion which is much better than a good program with a different purpose like Photoshop which is still better than a poor program with no real purpose like MS paint.
the last issue i have with ms paint is that the functions it DOES have are badly organized - you need to go through a dropdown and a tab just to get to the color sliders, and even then you can only adjust one color at a time. the program can save as several different formats, but it always changes the colors when it does unless the file was originally opened with a set palette (which in paint of course cannot be changed while it is being worked on in those formats)