AITAH for not telling my customer a card was damaged? (Pokemon cards)

AITAH? I (18 F) am unemployed and just turned 18 (during the time of this situation). I decided to start a depop since I been seeing it all over social media and I thought it would be a good way to earn a few bucks without having to throw away old stuff or things I don't use anymore. I listed a few things for reasonable prices, and thought I'd try selling some pokemon cards since people really like pokemon, all my cards were handed down from friends and family and I started collecting a lot during high school, specifically junior and senior year, so not that long ago. I had listed about 7 or 8, Pikachu pokemon cards, they were in okay condition, most of them were in perfect condition and there was two that were pretty weatherd, I listed it for 10 bucks since it was literally all my Pikachus and some were a little more "rare". they weren't supper expensive or anything but I card checked them and a few were over $2, I hate scalpers so I tried not price them crazy and made sure I added a decent discount, which would come out to $8 or $7 dollars at least. A girl messenged me, I don't know how old she was and I do know her name but I'll keep it private for the sake of respect and privacy. This girl messaged me for the for the cards saying she wanted to get them for her 4y/o, she asked if it's all of them together and if I could lower the price, I told her yes and I can only go to $8, she insisted on $6 but we landed on $7, a dollar for each card, which I thought was reasonable since people sell Pokemon cards for crazy numbers. Since the order was for " her child" I thought I'd add in extra cards, so at least 14 pokemon cards for $7 bucks, because why not, I love Pokemon, even if I was losing some interest now, the feeling of getting Pokemon cards is always something I loved and honored. I shipped it out and waited for my money to come in, mind you because I don't have packageing I have to pay for it, it's $2.04 which my boyfriend would pay for because I have no money. so I'd be only getting $5, but it wasn't a big deal to me of course. When she got them she messaged me saying if I knew one of them had a rip, I told her yes and it was shown in the pictures and I even told her I added in extra cards, and i told her that I don't know if there all real, that was stupid of me because I should have told her before she bought them, mind you I didn't buy most of the cards in my collection, lots of them were handed out to me, I felt bad but I just thought it wouldn't matter to much since they were for a 4 year old kid so I just let it be, she ended up refunding the order and keeping the cards. She reported the listing and depop wont let me do anything about the listing or refund. I was so angry because I lost out on $5 bucks and lost 14 pokemon cards, and I kinda just sat there feeling tricked, I don't know if it was my fault completely but I ended up going on a separate account and asking for my cards back, or the money. But ultimately I got angry and cussed her out and then blocked her before she replied and then my alt depop account got flagged. Looking back now I should have just let it go but I feel stolen from and lost 14 cards because someone wasn't happy with the condition, even though it was shown... Sounds kinda dumb now but I have no money and I was actually earning an okay amount from depop so I kinda lost out. After that my items stopped being shown and I was kinda just shadow banned I guess that means I got no more sells.