much of a muchness

much ado about nothing

A lot of fuss or bother about something trivial.

not much of anything

Very little; not a lot.

protest too much

To insist so passionately about something that people suspect the opposite of what one is saying.

so much for

An expression of dismissiveness, disappointment, disregard, or resignation; something said upon rejecting, giving up on, quitting, or disposing of something.