You said:

I'VE BEEN TEACHING FOR MORE THAN 20 years.

and I have been learning since you were begging your father to take you to JollyBee. Neither of the two statements mean much without evidence of progress. I see none in your rhetoric.
I don't know whom to feel sorrier for, you or the students.

Still as you have previously stated, you are a businesswoman and in education for the money. I hope you make a bundle.

Good day to you.