a 7th Grader and I took the SAT Reasoning Test Is 1590 bad score for someone at my level John Hopkins CTY?

A 1590 on the SAT is an exceptionally high score, regardless of age or affiliation with programs like Johns Hopkins CTY. It's in the 99th percentile, meaning you scored higher than 99% of test-takers. It's certainly not a "bad" score; it's fantastic!