Yep. Always read through the feedback. The only way you can make your dissatisfaction count is by giving them a positive but telling it how it is in the comments ie: buyer's remorse, etc.
I had a guy claim a card was damaged( card was Mint-Gem Mint) when the reality was that the player had just done their ACL. When I looked through their 100% feedback the phrase buyer's remorse came up a fair bit. He'd returned Kobe Bryant cards to multiple sellers when the card lost value. A real piece of work.
I let the arsehole keep the card and refunded him. I didn't want to give him my address for the return just in case I visited him one day( I calmed down after a week - but not until finding out that this lowlife owned 50% of a financial planning services company in Sydney with his brother). Based on his conduct as a buyer on ebay you would not want to do business with this tiprat and it's not a big stretch to think he would've f....d people over in his financial services dealings.
I thought about paying out on him on Social Media but it's not worth it. He seemed just the type of scoundrel who would sue. Or worse. A cheap skate gangster, lol.
Sometimes you just have to take it on the chin.