How the Bodhisatta found the way across, vast amount of time, misguided views, by himself?

It's said that after the Bodhisatta become Buddha, he was kind of surprised how himself came to that position, across vast amount of time, alternate views, other paths, misleading views. (basically infinite number/amount of spaghetti) **So, how he did it?** **What kind of thinking / practice oneself do in order to achieve / make that kind of determination?** **How oneself find it's way across this vast nonsense?** **How oneself fight against all odds, yet tell nobody?** Above all questions may seem different, but they all ask the same basic question. That's why they all are in same stack question. *I am not making this question up, that's what my heart is asking for few years now.*