I don’t know what “bossism” is…
TOS, shrinkwrap agreements, warranties, etc. are textbook examples of “adhesion contracts”, by which is meant: they are drafted by one of the parties with zero input from the other parties. They are offered unconditionally, there is no negotiation, no give-and-take, etc.
Accordingly, courts have routinely ruled that in the event of a dispute, where the terms of such agreements are ambiguous, the ruling goes in favor of the party that did not draft the contract (probably 90% of the time or more, according to one of my professors). But ambiguosity isn’t a necessary condition: about every other year (maybe more frequently, IDK), some kid gets blasted in the dome by a hockey puck or a baseball, or some kid gets trampled at a concert - and despite the “agreements” printed in 4pt font on the back of the ticket, judgments usually go in favor of the plaintiff.
Many of these agreements even say that you agree to hold the counterparty harmless even for things like fraud or gross negligence. Clauses like these are inserted into adhesion contracts regularly, although they do deter frivolous lawsuits (by increasing the costs thereof) in practical terms, they are unenforceable.
These examples are constructive, IMO, because they demonstrate that even in the current, distorted market, where contracts and agreements of this sort are very prevalent, these contracts simply don’t hold up under scrutiny.
Which is not to say that there is anything wrong per se with adhesion contracts. In fact they have benefits like lowering transaction costs, standardization/commoditization, etc., etc.