one–sid·ed 
/ˈwʌnˈsaɪdəd/ adjective
/ˈwʌnˈsaɪdəd/ adjective 1 disapproving : showing only one opinion or point of view
▪ Their interpretation of the study's results seems one-sided. ▪ His book presents a somewhat one-sided [=biased] view of the issue. 2 : led or controlled by one of the two people or groups involved
▪ Our conversation was very one-sided: Mom talked, and I listened. ▪ The game has been one-sided so far with the home team winning six to nothing.
▪ Their interpretation of the study's results seems one-sided. ▪ His book presents a somewhat one-sided [=biased] view of the issue.
▪ Our conversation was very one-sided: Mom talked, and I listened. ▪ The game has been one-sided so far with the home team winning six to nothing.
— one–sid·ed·ness noun [noncount]
▪ The one-sidedness of the game made it very boring.
▪ The one-sidedness of the game made it very boring.
