I do not think any so called Libertarian free will is at play here. If the many world interpretation is true, everything follows the wave function multiplying into many worlds.

If the Everett interpretation is right in the universe of the show, Forest did all the things you think he should have done, if these actions where permitted by the the wave function/laws on how the universe changes over time and space. We just happened to follow a branching path where he did not.

No, it, like the concepts of and infinite and/or cyclical universe with a limited number of laws governing it, stipulates that everything that can happen does happen, just not at the same point. Some events are just much, much more rare than others. Of course these events would seem absurd even if it is true, just…

Nah, The many worlds theory states that everything that can happen statistically happens according to the wave function. As far as I understand it as a novice in the field, it is a fully deterministic model in that sense. And if the Everett/MWI is true in the world of the show, and unless Lilly‘s will and actions…