If a single person or group of AGI developers were literally psychotic and they were the first to create genuine AGI (seed AI or human-inspired), how much of an existential risk would it be?

There's a theory in psychology that the most most revolutionary scientists and mathematicians are "mad genuises" having schizophrenia and/or bipolar disorder compared to most sucessful and innovative scientists and mathematicians that have lower schizotypal and emotionally labile traits. The top visionary (revolutionary) artists are more prone to those two mental illnesses, compared to sucessful but less visionary artists that have lower mental health problems. But scientists and mathematicians have a higher threshold of revolutionary success than artists who have a lower threshold before the rate of mental illness increases. For scientists, specifically, the threshold is around the level of completly overhauling the current paradigms.

In the case of AGI, it would mean overhauling machine learning (transformers and everything else) and symbolist AI and replacing it with novel algorithms that are more efficient and adaptable, with a level of diversity in information subfunctions only achieved by higher-order biological brains. Depending on how soon this is achieved would reflect the likelihood of them being a mad genius/es. If over several decades, it likely would be an incremental effort by more regular scientists, whereas if it was created within this year or even less time, it would increase the chance of the mad genius paradox taking effect, because of how drastic a change in thinking would be needed.

With that in mind, psychosis and schizotypal traits can create distortions and fixations in thinking unrelated to strict delusions and hallucinations, this is the disorganized aspect that leads to creativity. There is also a point of individualism in schizotypal/schizophrenic individuals, the eccentric/rebellious side that can be considered a paranoid reaction to the outside world and it's working, with a less intelligent and controlled mind, this will lead to tangents based on rejecting basic facts and ideas (such as the alphabet) out of fear of being contaminated, but with a brilliant mind, it could lead to intensed questioning, but seasoned by reasoning to back it up, causing them to venture out by rejecting modern theory based on it's slight inconsistences with what they notice in the data and their own judgement.