If you are unwilling to understand the significance of it taking until 1920 for women to receive the right to vote, and the variety of reasons for resistance to the ERA, then, I don't know what to say.
If you haven't, talk with the women in your life you are friends with about sexism and discrimination in the work place.
As far as talking with women about the sexism they've experienced - I've never denied women experience sexism. I've explicitly acknowledged that multiple times. My point is that the sexism they experience is not an organized system of oppression (i.e. it is not "systemic"). There are multiple, explicit, and codified systems that disadvantage men and I have pointed to several of them.
In fact we have a word for that and that word is “culture”. No one explicitly organizes it.
You use knowledge and reason, not to seek truth, but to occlude it for your own ends, driven by your own insecurities and fear.
2. From your wikipedia link, one of the key arguments against the amendment was that it would imply women could be drafted - "Political scientist Jane Mansbridge in her history of the ERA argues that the draft issue was the single most powerful argument used by Schlafly and the other opponents to defeat ERA".
If you want to show a persuasive (to me) example of systemic sexism, I think you should provide an example that is current and that systemically disadvantages women. If the lack of an ERA does disadvantage women, please explain how.