I agree with all that, and I'm never going to discourage anyone from working with other people whose goals are compatible with your own.

I think the issues with anarchism aren't with the goals which are largely compatible with ones that MLs have, but rather with the methodology. Vast majority of people who subscribe to anarchism mean well, but often reject effective methods for organizing and effecting change at scale.

For example, I find the rejection of authority to be highly problematic when it comes to building an effective movement. It's simply not possible for large groups of people to organize and to keep long term consistent goals in absence of centralization. You end up with many fractured groups each having their own idea pulling things in different directions, and a movement rife with opportunists. This is precisely what we see happening with western left at the moment.

There needs to be a consistent vision and some form of a vanguard whose job it is to ensure that all the different groups are pulling in the same direction. There also needs to be a common theory of change that everyone understands in a similar enough way to work together effectively.

In my experience, anarchists often tend to make the mistake of assuming that majority of people naturally shares their ideas, and if current system could somehow be torn down then we'd naturally enter an anarchist utopia. Of course, the reality, is that if the current system did happen to collapse, then it would be groups that have good organization that will end up coming into power. If the left fails to become disciplined then it will be the right that takes over.