Your objection to a perfectly cromulent answer is just namecalling. People take apart and find vulnerabilities, including cryptographic ones in closed source software all the time.
It's a closed source app. Translation: you and I don't know what it does. Take it apart all you want, but you're not going to find any backdoors or learn about how good the E2EE implementation is. Claiming otherwise is ridiculous.
It's a closed source app. Translation: you and I don't know what it does.
This just isn't true. It's a claim trivially disproved in public by, say, gazillions of detailed P0 posts. Again, all you have is namecalling and confidently stated things with obvious counter-examples.
Claiming otherwise is ridiculous.
Yours is an extraordinary claim that requires, never mind extraordinary, any evidence.
