I am a master student, my advisor gave me a topic he is not an expert at, a new field to him. The point is he is not an expert in the field he throw me in, he doesn't even give me technical advice in the topic when I ask, he is very old and lazy and the topic is a bit different than what he used to publish in so he doesn't understand much of what I am saying and partly because he doesn't have a background in the field, the meetings are not productive. I stopped visiting and now he blames me in front of his colleagues!
I am very irritated, I am not benefiting from the meetings why should I waste my time. I am fine working on my own! Like now it is my mistake really?
How to politely tell him "your meetings are not beneficial and I will work on my own"?