Please do not allow dumb people to tear you up inside. It does nothing positive and can harm your health.
I understand that we are little cogs in a much larger machine and as individuals have little influence on such crap. But sometimes just doing something may help. Identify what corporations fund those politicians, write them and tell them why you will not longer purchase their products. Write your elected representative and inform them that your vote is dependent on their position on such issues.
Yes, it probably won’t change anything. But you have done your best and that should alleviate the stress.