Become capable enough to stand alone and wise enough to know when standing together is better.

Two things have to be held at once. Build yourself into someone who could manage alone, so that no situation has you trapped. Then have the judgment to notice when working with others would genuinely be better, and choose that freely, because you are choosing rather than needing.

Check which half you are weaker on. If you rarely stand alone, build a capability. If you rarely stand with anyone, join something you could have done solo. Most people lean strongly one way, and the growth is nearly always in the direction that feels less natural.