No you did NOT.
Keep these "crap" players. Do daily friendlies, use them only for friendlies, don't train them at all, renew their contracts every time and you WILL drop average quality once they become 1* players.
Keep them, and use them for farming green & blue packs - non stop friendlies.
They do average out your TOP 14, yes, and here is the catch. Stop, and think a little bit... "What if I don't have TOP 14, and just 11 ?"
Best regards