Why Camtasia always produce video with a low quality, even if I record in 1280p, for example?

I spent some time learning this tool, but I’m disappointed because I cannot produce video enough quality. Look for that, firt I have a screen snippet of the video still inside the Canvas on Camtasia, it have a nice quality, and below that I have the same snippet of the video yet produced by Camtasia, in MP4 format – low quality.

I’m not referring to the size of the screen, you can see the difference in the quality of the video, it have blurry and a bad color… If I’m not wrong, I’ve recorded and produced in 1280p or 720p at least.

Someone can help? Or at least, say to me that “it is just a problem with my PC and Camtasia are not that bad guy, Camtasia CAN PRODUCE IN HIGH QUALITY!”. I spent most of my time learning it.