I assume you want to become a better artist, but you're not portraying your vision the way you want the picture to turn out. There's a lot of empty white space over at the bottom and right sides of the picture, for starters. This drawing of Ivysaur looks quite sloppy and rushed. It doesn't hurt to retry and refine a picture, you'll simply be spending more time on the picture.
You can maintain the silly faces and disproportionate bodies if you want to; it can help make your drawings recognizable and remembered. Of course, now I would recognize your art style anyway, even if it's drawn in Microsoft Paint.
Speaking of which, do you feel that Photoshop is too expensive for you? You don't have to resort to MS Paint to draw your pictures. There are some better image editors you can download for free. GIMP and Paint.net are popular alternatives to Photoshop.
Those who have seen a lot of drawings made in MS Paint will be quick to recognize the next one. Looking closely at the edges of any lines, whether freehand, straight, or curved, it's easy to notice they're not smooth - rather, they're somewhat pixelated. This is Microsoft's fault and no one else's, but it also makes me urge you and everyone to use a different, more flexible program.
Another thing... am I missing some humorous context here? More than likely, I am. Two years ago, I posted a similarly constructive review on a Clock Crew video, unaware that the Clock Crew as a whole is dedicated to producing such silly content. Maybe your pictures are intentional, and you're part of some other group of artists which draw these things. In that case, this is funny. Keep drawing the way you're drawing!
