My hydraulic brake (both left and right) has gotten weaker. I don't know how to say it, but it's like my brakes can now be pressed deeper. My front brake is so bad that it is touching the grips. I got this problem after a crash I had. Can someone help me find a solution to fix this?
If both brakes are exhibiting the same issue, and the issue had developed in parallel over time it's likely that they just need to be bled.
If a crash caused damage and allowed air to enter the braking system, it's likely that only one brake would be affected.
You should inspect the entire brake system looking for damage. Also check the brake pad wear and sticking pistons.