We have to go step by step because this is extreme cope.
First, while it's true that different people process things differently, this is still a story, in which people expect certain emotional moments to hold weight. What was WCI for if sanji is still suicidal? Does Luffy words mean nothing to him?
Second, from spoilers it seems sanji has no self worth, which makes him getting hit by these okamas when he could've not apparently.
What does it entail? Self harm? He fights recklessly? (who doesn't in the sh? Luffy is half dead half the story) he sacrifices himself for others? (who doesn't in the strawhats?)
How is it a weak point? Is it always active even when he fights for his crew? (almost his every fight?)
Again, this is just too much. Trauma ok, giving him a new retroactive character flaw without explaining it or giving examples is just stating something and retconning a character way too late in the story, stripping tensions from his serious developments.
A few sanji fans, less coping about it than you, are already trying to set things straight (he fights too recklessly, he doesn't get hurt on purpose) but I fear it might be the second from the spoilers, which is nothing short of character assasination