Even the best teachers won't be engaging to some of their students.
Moreover, this system we have is at the detriment of boys' education. Many of those who misbehave or underperform because they don't want to sit at a desk all day are loaded up with ADHD drugs because it's a system that doesn't work for them. I don't have a link but government stats show clear underperformance among boys.
I was actually never loaded with ADHD drugs even though I turned out to have needed them. Nuts that it's given to people who might not need it, while people who do need it are overlooked.