The status quo. You’re condemning men for maintaining the status quo in order to agree on something going forward on a handful of issues when every other word was essentially revolutionary.
This is prior to the Article I branch of government, Congress, abdicating much of its power and creating this myth of coequal branches of government, and when House districts were a lot smaller, and you and your neighbors has to decide between yourselves who was in charge of certain functions of keeping society going. You know, who was going to be the local Sheriff, who was going to run the local court, who was going to deliver the mail and so on. Many of these jobs were boring and without glory, but someone had to do them.
Had Madison’s Virginia Plan been implemented in full and the Connecticut Compromise wasn’t implemented, it would likely have been more democratic still.
Structurally, the United States constitution is overwhelmingly democratic, and especially for the time it was written and ratified. If it has grown less democratic at all, it is due to factors the signers and ratifiers of the Constitution could never have predicted that occurred in the 230 years since. No one could have foreseen Congress would abdicate much of it’s power and responsibilities in the 20th Century, or that the Industrial Revolution would lead to the single greatest explosion of the human population in history, or that we would choose to let in so many foreigners. Nobody thought each House member would be representing a district in the hundreds of thousands at a time when they thought one House member per 50K might be too few.
Is it democratic? Oh yes. It is the most democratic document of its time, and few legal documents written since then could plausibly claim to be more so.