Your grades are fine, and may only reflect someone who’s bored by the lack of interesting teaching methods employed by underpaid, undermotivated teachers and “one size fits all” school systems.

I know plenty of people who are very successful, but who didn’t get good grades in all their classes. If you have good ability to learn stuff that you’re interested in, THAT is what makes for success. That and having a personality that others don’t mind coming to work and interacting with – I also know of other people who got very high grades, and have rotten personalities and lack common sense, and they have not done very well in terms of job advancement, or even being able to keep a job.