You suffer from the error of extrapolating modern standards to historical times. Death and mayhem in the name of religion is, unfortunately, part of the human condition, and Catholics are no different, as you well know.
Rome lost England, and indeed the world it previously controlled, because it was distracted by political intrigue and bureaucracy of the time. If Rome focused as you do on “reacquiring thrones” and re-establishing the tyrannies of old, Catholicism would be ill-served. They are properly focused today on religion. If you were to have the same conversation you are having with me with your priest, I think he’d explain the Catholic point of view better than I.
That is probably something you should do sooner rather than later.
As a protestant what makes you a reliable source on Catholicism?