Taking doubts after the class is not right because...

Taking doubts after the class is not right because it is difficult to find the exact doubt in the topic. content is nice, but the quality of teaching requirres a whole lot of improvement . when the class is going on it is really diificult to judge what the teacher is exacly . the teacher just keeps on teaching the content without realising wheather the student is understanding. I spent 1000 rs in this training and I literaly didn't understand anything . according to me its a total waste of money. moreover you cannot ask your doubt in the language in which you are comfortable and there is a huge queue in the doubts session