I don’t have a revulsion for the OP, just giving a reality check. He/she can apply anywhere they want. I hope my school would not admit someone who admits they are a slacker. If they had posted that they had an uneven high school record, that they excelled in some things and not in others, I would have had a different answer. I am reacting to their own admission that they are a slacker, nothing else.
And yes, a transcript does not tell the whole story. Some students from disadvantaged backgrounds may not have the stellar transcripts and extra curricular activities as their more well off counterparts. However, I am sure there is a teacher or counselor that will attest to the fact that they are the hardest worker they know and that they do some much with the little that they have available to them. Yale admits candidates like this all the time as evidenced by the number of Questbridge Scholars in each class. I am always accused of being blunt, nothing is different here.