Pawel still has access to the Bambu-modified software, which is what the AGPL covers. There is no violation there.
Bambu's issue is with him taking a fork of Orca and spoofing some data (from THEIR FREELY AVAILABLE SOURCE CODE) to appear as Bambustudio to their servers.
A contract that says you can park in my driveway doesn't give you permission to access my garage and use all my tools.
Absolutely a dick move but not really not abuse of a contract.
The AGPL does not just say he has to have access to the modified software. It also says he has to be granted permission to redistribute it, or derived works, under the same terms.
He redistributed a derived work under the same terms and got hit with the threat of legal action.
I don't know what "access my garage and use all my tools" is supposed to be an analogy for in this situation.