We have some facts in the accounts, some things that aren't public or aren't quantifiable at all, and it's up to the individual to interpret that picture as they choose. Personally I am acutely aware that this fan base is extremely reactive lately and so I would wait for the interpretation of an unbiased expert on such matters who isn't influenced by emotion, such as that Kieran Maguire who is usually the man on these matters.
For example, this person says the club is being run in a totally unsustainable way. That is an opinion, and it relies on contextual information which we don't have. They also say that the finances rely entirely on player sales; I'm no accountant but I would allow for the possibility that in a retrospective set of accounts, we have specifically chosen to spend an amount based on the player sales we know we've made. Perhaps if we hadn't made those sales then we wouldn't have spent so much, in which case it would be wrong to say that we're totally dependent on player sales as if that's a dangerous and unsustainable thing.
Ultimately, we don't know enough to come to any sort of conclusion, football is a nonsensical industry financially and our choice is to trust or not the trust the people in charge. I think you are prudent to not trust Acun unconditionally, and football club owners in general. But I also think he's done nothing to deserve our distrust in a financial sense.