I feel like I’ve never seen or heard of anyone good using that quote. I’m sure it makes some sense if used in genuine good faith. The quote would make sense applied to someone with a disability, for example, by interpreting it more along the lines of having to deal with the person not always being outgoing and maybe even sometimes needing extra help.

But no, I’ve only ever seen shitty (or at least allegedly shitty) people use that quote, to justify their shittiness. The “worst” they refer to is usually bouts of anger or abuse.