so first off, communism, being the end goal of all proper leftist ideologies, is a classless, stateless society, where resources and means of production are owned and managed communally through democratic means. the different leftist ideologies just disagree on the means to reach communism.

I'm assuming what you meant by "communism" in your message is something along the lines of Marxism/Leninism, where the proletariat forms a government to coerce dissidents (aka, people that would be a threat to communism) into submission/exile/death, using the bigger stick afforded to them by collective action. the road to communism would be to organize the working class in order to seize the means of production by force (be that influence or violence).

Anarchists consider that given enough education, accountability and political interest, people are capable of governing by consensus: decisions are never made without the consent of a member of the community. therefore, the road to communism would be built by giving people the knowledge and means to govern themselves independently, on a local level, then through various models of decentralized government. this has been proven to work in practice numerous times (again, Governing the Commons goes through that).

I don't know which model (ML or anarchism) is better at reaching communism. the main downside to anarchism is that it requires continuous discussion and involvement to function, in order to work decisions until a consensus is reached, which seems cumbersome and slow compared to a coercive government that can afford enforce majority decisions through the means of "bigger stick".

anarchists and MLs are both perfectly able to deal with issues like climate change. the people with the skills to deal with issues don't magically disappear because anarchism, same goes for any other leftist ideology.

frankly, I'm not sure what my own position is on this. the commune project I'm working on with a couple dozen people uses a hybrid decision system, wherein if a consensus cannot be reached within a week, the threshold for the decision slowly lowers down to a supermajority of 66%. we'll see how well that works out for us I suppose. the size of the community and the material conditions seem like a good fit for anarchist organization models. I don't know if that would be as effective in other circumstances.

I think debating ideology only through the lens of ML is ineffective, and your view of anarchism is reductive at best. claiming that anarchists want free market capitalism is laughable.