With so much staking and lending on-chain, why is the annualized rate less than 10% when lending on Binance?

Good Binance, I borrowed more than 10,000 USDT by staking in Binance's financial products, but I feel that the interest is a bit off. I made several repayments by specifically buying USDT, but the speed of repayment doesn't keep up with the speed of interest increasing. My repayments are all over 100 USDT, and I've repaid several hundreds of USDT in a month, but the loan amount hasn't decreased. I find it suspicious. Then, last Wednesday at 10:15 AM, I took a photo of my debt with my phone and sent it to my WeChat. At that time, the debt was -15,373.55. By Saturday at 8:59 PM, the debt was 15,382.07, meaning the interest generated in 82 hours was 8.52 USDT, or about 0.1075 USDT per hour. However, when I checked again on Sunday night at 10 PM, from Saturday at 8:59 PM to Sunday at 10 PM, which is almost 25 hours, the loan amount had changed to 15,386.55. This means that during this 25-hour period, interest increased by 4.48 USDT, averaging 0.18 USDT per hour. If everyone compares, they will see how much 0.1075 differs from 0.18, and the explanation given by customer service is that their interest is calculated as compound interest. Isn't that nonsense? This 8.52 interest is added to the loan, increasing the daily interest by 2 USDT. Everyone can see how dark their methods are. The customer service response is good, and they say you can choose not to borrow if you feel there is a problem. It's really tearful.