Turning "environmental regulation" into a unified bloc that must be either supported or opposed in totality is a manipulative political maneuver and it should be forcefully rejected.
Regulations are not people, and they don't have rights. It is fair and reasonable to demand that environmental regulation justify its existence with hard, scientifically verifiable data or else get chopped. Clearly, banning leaded gasoline has that kind of justification, and therefore I'm strongly in favor of maintaining that ban and extending it wherever it isn't in place yet. The same reasonable standard should be applied to other regulations across the board.
You're right. Off the top of my head, the stupidest environmental regulation I can think of right now is the banning of plastic straws. It's such a minuscule amount of plastic used compared to the mountains of bags and packaging used in general commerce and industry.
Don't get me wrong, I'm all for protecting our environment. I just believe in evidence-based policy and setting priorities correctly. After all, money, labor, and attention are finite resources.