What's important is your need to answer those questions that you have. Teacher's only guide a student & plant the seed. It's the student who does the work to find the answers. You can drag a horse to water, but you can't make him drink. You weren't drug to the water. You went to the water because of your need. You will prosper in your endeavors because you are educating yourself.
No one is going to think you are too critical. What's wrong with that picture is that the administration didn't do their job to ensure certain objectives were taught in the classroom. On behalf of all teachers and former teachers, I'd like to say, "You go girl" And share what you've learned. You may be that spark in someone else's life who is too afraid to ask.