Yes, total rip-off.
You are allowed to terminate a two-page contract just like that and your contractual partner is not. I find that totally unfair to the banks and therefore it is a rip-off.
Yes, alright... it's not a rip-off, I take it back. I didn't want to start a fundamental discussion about contract terms here either... It was about the deadlines for terminations
The interest rate at that time was certainly market-appropriate. It was only in recent years that it dropped significantly. Be happy. Your repayment will rise to over 5%.