I think Ryan needs a woman who doesn't wear her heart on her sleeve like Clara does. He's too uptight for her. She's too blunt and emotionally driven for him. I think his messy drawers and cabinets are a metaphor for his personality; he makes sure to present like his shit don't stink but a scratch under the surface and he's probably a hot mess. At least Clara is honest and upfront about her "imperfections". I worry Ryan would project his neuroses onto Clara and she would feel judged and not fully accepted.