what happended today, I sent 1 BTC into another wallet, and it took 2.5 USD. so high
$2.5 fee is too much for sending ~$7000$ ?

It's less than 0.04%
Go to Paypal to receive $7000 and you will feel the pain when you will see how much you're charged to receive the same amount. And don't forget to consider that the sender would also pay a fee to seed to you