aggressive co-worker and bullying at the lab
It is unlikely you can fight this culture, and academic settings have practically no good ways to address bullying of this nature. If you find what seems to be one, look for evidence that it has worked for past students. Recently.

Alternately, make the bully your friend. This is not advisable.  Alternately, work with people the bully cannot impact, which is a version of leaving. This may be unavailable, depending on your situation. 

Calling out this bully may help, but if it does not it will make you a target.  Again, it is highly unlikely your institution has any kind of meaningful recourse available.

Your best strategy? Leave. Keep your head down, and start planning your exit now. After you have an exit, cite the bully as the reason to both your PI and HR; it may help others.