He says as much by later claiming that the Jedi were responsible for the creation of Darth Vader.
Speaking of which, I suggest reinforcing the destruction idea/inference by changing the line to: “It was the Jedi who were responsible for the training and creation of Dooku and Vader.” Of course, Rey can still remind Luke: “And a Jedi who saved him,” which leans more into Vader than Dooku as he did that in RotJ.