Chase was 6 when we got Lark, who was a 12 week old bundle of energy. I don't remember him ever correcting her for being annoying, even when she hung on his neck like a little vampire bat. Poor Chasey had scabs around his neck from her attentions. As she got a little older she was less of a pest to him but her energy level always outstripped his. He also never did anything to stick up for himself that we ever saw. We had to be very intentional with making sure Chase got some time and attention away from little Vampira.
I hope Matador does well in his new home! That has to be a bittersweet experience to see him go but you've given him the best chances for success, so good work!