There were few in Theseus' favor these days, he'd painted a ragged trail and left some unturned stones behind him. It was a painfully slow process trying to rebuild things to something he could be proud of, and with the right people on his side maybe he could be someone to look up to again instead of just the coward that the world wanted him to be. There was depth there that Poseidon could be envious of....because in that moment Amphitrite had pity on him (even in the smallest measure) and Theseus by gods was going to take it.
"I'm not my father, but I guess I've been living under his shadow now for some time." Theseus had a spine, just few actually believed it strong and unbreakable. He always ran before proving anything and he just had a spine made of jelly.