I mean... I don't want to sound a smartass but it's the whole point of organizing. If one person alone can sabotage your actions are we sure that they are the issue? Just plan strategically aware of your powers for some achievable targets and so you can keep people who don't want that same target or ruin the plan away. The naiveté is thinking we can avoid using their tools against them or trying to do politics without getting our hands dirty with some incoherence or ''impurity''

in this answer there also could be a space for ''machiavellan'' leftists that find more barriers instead of allies because they are not pure to others but it would be a bit of shouting against the wind lol

it's sad having to think about politics like a strategy game? yes

do we have an alternative to have the future we want? not really