𝐓he attitude of that's just how I am, take it or leave it is still 𝗮 𝘀𝗶𝗴𝗻 𝗼𝗳 𝗶𝗺𝗺𝗮𝘁𝘂𝗿𝗶𝘁𝘆. As an adult, it's your responsibility to figure out which of your traits are 𝘁𝗼𝘅𝗶𝗰 and are 𝗻𝗲𝗴𝗮𝘁𝗶𝘃𝗲𝗹𝘆 impactful towards other people and the ones you love, and to eventually learn how to fix them. At some point, we all gotta start making ourselves better individuals.
If you truly believe you don't have to change anything about yourself, even at the very least the worst in you, and that people will just have to deal with it, then sorry, 𝘆𝗼𝘂'𝗿𝗲 𝘀𝘁𝗶𝗹𝗹 𝗮 𝗰𝗵𝗶𝗹𝗱.