Does smurfing ruin low elo game

Sorry if this offends anyone but I just wanna know the community opinion on smurfs in low elo does it ruin the game when one player can create such a difference in the game and not get punished for it. Cause the people at that rank are really trying hard to improve and get out while this person is holding them back in my opinion it seems really unfair and I know that people will laugh at me or ignore this but that's fine I just want to see how other people view this
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