be careful before the transaction, the value of 1 dollar is already different in p2p, why do you want to buy

I regret buying USDT on Binance for 10,000,000 and only getting 553, that's it.
Compared to buying on Tokocrypto, the difference is very far, and for 2,500,000 it's also very different, not careful comparing with others.
Why is Binance's service like this, it feels unfair.