I quite like (1), sounds amusing and wonderful -- no?
Many words in English have this origin, eg., Shakespeare did this all the time giving us the verbs "to champion", "to elbow"... from nouns.
bi-* (2) is fair, being an ambiguity.
reaching-out (3) contains less information than the alternatives provide, but do they provide too much? Given how we are connected in so many different ways now, does labouring to include which mechanism really seem efficient?
(4) Bootstrapping is an american cultural fetishization of individual spunk/moxie (etc. americans have many words for it). I suspect your objection has more to do with this cultural disposition to self-promotion and borderline delusional accounts of their own gumption and lack of others.
Europe, owing to the class system and 1000s-year+ settlement has a lot more preoccupation with the role society plays in success.
As far as all that goes however, "bootstrapping" seems a good word to mean, "I think I did most of this myself".
PS. I will say, for any offended americans, that I think europeans sometimes have the reverse delusion, esp. the british: that nothing can be done alone, and it's not worth trying.