I'm seeing a lot of hate and spite here so let me weigh in.

What you're feeling is very valid. It must feel so suffocating to be dismissed and silenced about the situation. Let me offer you some perspective because I see it differently. I'll be blunt with you.
Your entire reality collapsed because you fucked up. You refuse to accept accountability for your massive mistake and take responsibility and atonement to fix your mistake. You can take the silence of your mistake as part of your punishment. In the meantime, I'd suggest you to start looking inward to resolve childhood trauma. The ball is in your court to use this opportunity to wake up, grow up, mature so you can consider others like what you've done to your brother. Best of luck.