How old/at what age for you is rebellious ?

I'm 21 this year , lookin at myself as an adult and i don't see myself as being a rebellious kid from past till now , but sometimes when people just barge into my way and says something stupid which hurts my feeling i'm really pissed off , and when i cant take it i dash my way up to the room.
Am i being too kiddy ?

Besides , they think they're right and they dont give a shit or care to hear one word from your opening mouth . I'm an artist , yes. I do art.But thats not all i do . I do care for my family and i really do something for them , i do other stuffs too and i'm not someone who sits down all day and draw , thou thats the longer time i spent compared to other things i do , but how can it be helped when i'm suppose to find a job concernin to what i'm doin now ?? And i still hear people telling me that i do nothing but draw as long as it looks good i'm fine with other shit ??

I dont mind people telling me how bad my drawin is , how bad my works are , how ugly how disturbing how shitty it is , how unorganized my time is , how i should improve my schedule , I agree with them and be any happier to hear more and i'm still improving myself , BUT i certainly DO NOT agree when they came upon me telling me "all you do is draw draw draw as long as it looks good then its fine for you , cuz you dont care bout any other things around you " .

That makes me look so selfish and i've been holding this fuck for so long bout 3 years since i entered coll ?? everytime i hear this it makes me feel so sad and , makes me feel so ..so selfish and all ..how can i make them understand that i'm doing my best in both part already ? and i certainly had , even better than last time.

Just trying to share bout something that you fellow artist out there might face one day or you already had..At least i feel better posting this shit up here .