I'm not going to wipe down the gym equipment
Why can't you clean the gym equipment?
I am thinking of quitting my gym membership.
That is really gross not to wipe down gym equipment after you use it. You should not be disrespectful to the next people that use it.
I never asked for your advice.
You didn't but you are disobeying a core gym rule. You signed up for it, so you need to abide by their rules. If you don't want to clean the gym's equipment after using it, then you should quit the membership.