It's a legal document, and you confess you know nothing about legal stuff, so your opinion of how it is worded hardly holds any weight. It's incomparable to a normal press release for a start, you're comparing apples and oranges. It's drafted by legal experts and it is worded perfectly in that regard, it may well not be worded perfectly for a layman like you or I to digest but that would be to fundamentally mistake its purpose.
If it was as simple as 'not cooperating', why has every single other club punished by UEFA - including City in the past - not tried it? Because it only works if UEFA's case is not viable from the start. When it is, as when City were punished in 2014, then the club will cooperate and try to reach a settlement. Which City did, and part of the settlement meant that City gave UEFA access to all of its relevant records needed to assess the ongoing period up until 2017, at which point UEFA were happy with what they saw and allowed City to exit the settlement.
People are desperate to make apocalyptic conclusions about what this means for FFP, but nothing has changed. The case has been and always will be that anything UEFA does has to be able stand up in an independent court - do people take issue with this principle? This time it could not. Simple as that. UEFA were clearly influenced by politics and decided to pursue a flimsy case. It would not be a 'victory' for football or FFP if they had been allowed to prevail in that pursuit.