What the director told Shizuma relationship advice wise wasn't good at all but at least they're not a bad person by nature. It's good to see Minato and Shizuma talking it out, hope they continue talking it all out and not bottling it up. Neither of them are really that toxic, it's just that Shizuma needs to set clearer boundaries and stick to them while Minato needs to talk it all out, tell Shizuma what bothers him instead keeping it all inside until it eventually explodes. It's completely understandable what trauma can do to a person and being sensitive isn't wrong in any way.
I do hope the director gets someone of their own so that they could be appreciated for who they are. It's just sounds like it would be an interesting thing to see.