Matched Against Higher ELO

Hello all,

Recently, I have been matched over and over against higher ELO players. As an unranked player, when i use websites such as porofessor, or LolKing, too see my opponents stats and match history, I notice that they are often High Plat or even Challenger! When I lose the lane, my teammates are obviously frustrated with me for my performance. I fail to understand why I am not paired against Bronze or even Silver players, compared to the Challenger and Platinum that I currently play against.