I don't understand why anarchists disassociate from 'the left'. It doesn't really matter to me too much, but since usually people that ditch the left/right spectrum invoke instead bullshit about 'occupying the centre-ground of politics' and straying neither too far to the left or right, then I am bit reluctant to ditch the term. Also I am not really sure about this, but don't some fascists like 'third positionists' also do this.
The left to me always encompassed ideologies and beliefs that are socialist, that are concerned about the exploitation that arises from wage labour, that seek freedom for the working class and seek to better the conditions of humanity and also have a humanist and internationalist perspective. I considered anarchism to belong to that tradition, although I know it places us alongside social democrats, liberals and etc, but I don't think any of them other than anarchism are really committed to those goals and none of them other than anarchism can deliver on them.
Don't really want to give up the term, because I think most people understand it to mean something along the lines of what I described, and like the term libertarian it seems to me like a word we have to win.
EDIT: I mean I don't think anarchism is at all synonymous with 'the left' unlike the term 'libertarian', but I think its a leftist tradition, and I think we have to win over the left, direct it towards anarchism and expose all the leftist tricksters including those that merely want some unachievable 'moral' kind of capitalism