That's not necessarily the case at all. I attended Novus Ordo masses for most of my life, but if I were to sit down and rank the top 10 homilies I've ever heard at a Sunday mass, I'd say that eight or nine of them were heard at Tridentine masses in the last three years.
And the one or two top-rate sermons I've heard at Novus Ordo masses were given by old Benedictine monks from India at a monastary in northern New Jersey.
The Anglican converts preach rings around the native Catholic priests, almost to a man.
I had a great homiletics teacher in the seminary, God rest him. The guys now are obviously not very demanding and, as a result, Catholics are starved for inspired preaching.