having trouble with colors degrading on importing to adobe premiere pro

Hi, 

The trouble that I'm having is that everytime I upload my content the quality drops. the colors go bland, they are dull,theyre so many greyish tones, the video clip is so low quality, too much pixelation, to muc brightness on the muse. I have tried to use the Lumteri Color ans Scopes, tried to change settings, sequence settings, I tried using presets during exporting, watched and tested so many videos on YouTube and Adobe nothings working. This is very important to me. Its slowing down all my work. I need to create content and due to these issues I'm unable to do so. 

In this image below, the right side is the uploaded video clip which is dropping quality and color tones are too dull and greyish, where as on the left side is the original quality, bright colors, lively, smooth

Please help me out on this.

Thank You.