I want to start off with wishing you good luck in your journey for CRNA school. Like many other posters I find many issues with your initial statement.
First yes BSN is very important and essential to become a successful SRNA student/provider. You may view these classes as useless, but they are the cornerstone of the profession. Those courses that are more then likely viewed as useless for the cornerstone courses are essential such how to critically analyze research, since the profession is built on a plethora of research. In addition, communication and collaboration is the cornerstone to create the best and safest plan of care.
I will say attitude is essential to getting into CRNA programs. For every spot there is 10 applicants. If the initial attitude is the uselessness of the Bachelors degree there are 9 other people who will get that spot over you. I hesitantly would advise that is chemistry and science classes are the upmost important aspect of anesthesia you may want to consider Anesthesia Assistant over CRNA. I promise you I mean no malice or cruelness, but another profespctive form someone in the field.