I am uninterested in comparing the moral qualities of generations. Humans are humans.
I am interested in the scale of the violence done by these generations against the earth as it will never be able to be surpassed without fully annihilating the human race.
800 years from now no one is going to care how sorry everyone was now about the damage they have done, what matters is the impact and for the destructive impact generations such as Boomers have done to the earth they will be remembered for thousands of years as a calamity.
By the way the "Tragedy Of The Commons" has largely been discarded as a useful way of understanding societies, it is a political narrative with an interest in specific ideologies more than a serious tool to understand humanity.
https://boingboing.net/2019/03/07/scientific-fraud.html
As Mildenberger points out, this isn't a case where a terrible person had some great ideas that outlived them: Hardin's Tragedy of the Commons was a piece of intellectual fraud committed in service to his racist, eugenicist ideology.
What's worse: the environmental movement elevates Hardin to sainthood, whitewashing his racism and celebrating "The Tragedy of the Commons" as a seminal work of environmental literature. But Hardin is no friend of the environment: his noxious cocktail of racism and false history are used to move public lands into private ownership or stewardship, (literally) paving the way for devastating exploitation of those lands.
By contrast, consider Nobelist Elinor Ostrom's Governing the Commons, whose groundbreaking insights on the management of common resources are a prescription for a better, more prosperous, more egalitarian future.
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(Hardin quotes that didn't make it into his seminal paper: "Diversity is the opposite of unity, and unity is a prime requirement for national survival" and "My position is that this idea of a multiethnic society is a disaster…we should restrict immigration for that reason.")