The Founders didn’t put a right to vote in the Constitution for a REASON.
Its all of the Amendments since taking away States rights to dictate voting rights that are the problem.
But the gist of your post was the mythical “Founders were bigots” belief that they all banned this, that and the other from voting.
There is nothing the Constitution about that.
That many enacted these qualifications locally is not the point. Some did not. Thus, it is NOT universal that the Founding generation enacted univeral rules because they “had a reason for keeping poor, women, blacks, etc from voting”.