You are overloading your gels, that is why the protein profile of the samples you have loaded look like this. Load less amount of extract (I would say 1/3). Also, the horizontal lines you are observing across the gel, if I am not wrong, comes from contamination of your reagents to prepare gels. If any buffer/acrylamide is contaminated with keratin from our skin or just protein contamination from mishandling, it will appear like this in your gel. I would make new stock reagents to prepare gels.
What is the size of the protein of your interest? Prepare your gels with appropriate acrylamide concentration to see your protein properly. I don't know if your protein of interest is the band that is at the bottom of the gel, then raise the acrylamide concentration so smaller proteins are better resolved.