Every single human on the face of this earth has a flaw. Some people have flaws on the inside and others have ones on the outside. There's this amazing quote by Roald Dahl that goes
“If a person has ugly thoughts, it begins to show on the face. And when that person has ugly thoughts every day, every week, every year, the face gets uglier and uglier until you can hardly bear to look at it. A person who has good thoughts cannot ever be ugly. You can have a wonky nose and a crooked mouth and a double chin and stick-out teeth, but if you have good thoughts it will shine out of your face like sunbeams and you will always look lovely.”
This is extremely true, how you think about yourself really shows. And just so you know, if any girl will not date you because of a skin issue, then they themselves have issues that are inside.
Severe acne can be more than a "flaw". If it becomes inflammatory enough with sizeable lesions it can be a certified disfigurement and make the person completely undesirable. A pimple problem here and there like skin that is prone to the occasional bad breakout I would consider a "flaw" and not the biggest deal in the world but something more severe, like say widespread acne conglobata is crippling.
I agree 100% with you that acne can be crippling, especially if it is more than just a small breakout. But, acne isn't just something that comes and goes in a day. Acne usually sticks around for a little while. If you have to live with something, I personally think you should try and be as positive as you can about it. If you let things get to you and ruin your life, that would not be a fun life to live.
I do disagree that acne "makes the person completely undesirable" even with very severe acne. There is a model named Cassandra Bankson who has severe acne. She's not perfect, but I admire that she makes youtube videos with her severe acne and seems very bubbly and happy in life, even though she lives with severe acne.
Cassandra Bankson does not suffer from cystic acne, she has moderate inflammatory acne that has now mostly subsided. I would never classify her acne as severe as it wasn't nodular. Now this girl, Elaine Mokk (who's also on youtube) has TRULY disfiguring horrific acne
Cassandra Bankson does suffer from cystic acne, she's said it herself. And yes, Elaine Mokk does have severe acne, but she has nice lips and pretty eyes. There is so much more to her than her skin. (: