Sorry, this may be unpopular, but software license click-through agreements are enforceable.
Source: I’m not a lawyer, but worked in a software contracts office with lawyers, so some of it ruined off. Essentially your legal options are, use the software according to the license agreement, or don’t use the software.
A third option would be, I guess, use open source software so you don’t deal with that bullshit.
Edit: Part of it is wrapped up in the Uniform Commercial Code, which is a whole bundle of standard laws which is quite complex. Basically you pays your money, and you get a thing, but there are all sports of knobs and levers to handle every contingency. You can nope out of the transaction, but you don’t get the thing.