This man has presented himself as a flawless victim, which is the single biggest psychological red flag in his profile.
I put your q into google for its assessment, and it came up with everything everyone has been saying here.
Google:
The "Blameless Victim" Trope: He is intelligent, funny, and caring, while his ex is a "narcissist" who ruined their child and turned everyone against him. In reality, healthy, mature adults usually say, "The marriage broke down, we both made mistakes, and it’s a sad situation." Complete lack of accountability is a major warning sign.
The Estrangement Reality Check: A parent completely cut off from a teenage child is a massive alarm bell. While parental alienation does happen, it is rarely absolute without some contributing behaviour from the estranged parent. There is a reason his own child will not see him, and you only know his version.
The "Claire’s Law" Misconception: Relying on Claire’s Law yielding no results as a green flag is a logical fallacy. Claire's Law only shows police records. Most domestic abuse, coercive control, or toxic family dynamics never result in police intervention or a criminal record.
Watch the Vocabulary: Be wary of people who weaponise therapy speak (like "narcissist" or "toxic") to describe anyone they have a conflict with. It often masks their own difficult behaviour.
Observe the Ongoing Drama: A year of zero face-to-face contact, yet still living in the family home during an ongoing divorce, means the legal and financial storm hasn't even hit its peak yet. He is in a crisis zone, not a dating zone.
Check for Contentment vs. Bitterness: An outgoing, well-travelled person should have a full, vibrant life. If their primary topic of conversation is how their ex ruined their relationship with their child, they are not emotionally healed enough to date.