Well, aren't you privileging the hypothesis that cryonics works?

Making people into psychopaths would be extremely difficult even if you were trying to do it. Cryonics working is a hypothesis that I would put as 'very slightly more likely than a desirable technological singularity'. It is worth the $300 a year because it is one of very few things that can actually save your life in the long term.

Unless you're saying that your hypothetical thawing process will be nearly perfectly safe, I'd argue that there is a risk of disability, an outcome which may rank below death (depending on your individual value function, of course).

I count all those scenarios as 'cryonics not working'.