why parents got such high expectations for everything i’ll tell them im 16 years old and they say when they were my age they were 19

i never really talk/ed about this but over the past years ive learnt to accept my past and i started showing my arms and legs a lot more and most importantly my scars and i dont wear long sleeves or jeans in summer anymore and they are always visible but i dont mind much anymore, i always used to worry about someone seeing them because i hate my scars and am embarrassed about all the terrible things ive done to myself in the past but now i go to the beach without worrying about someone seeing them and idk i guess thats something i can be proud of