Currently it takes 10-20 seconds to struggle out of any restraints.

This basically negates the effect of having the mechanic of restraining survivors altogether, as the whole point of restraining them is to be able to pay attention to other issues undisturbed.

Additionally, the times are completely unrealistic.

Would it be possible to have this design decision revisited, and maybe increase the time required to struggle out of restraints, especially for the most uncommon ones such as the handcuffs?

This is the only thing we have modded in our server (3x vanilla times) as we are very happy with the current status of the game in the rest, and it is a shame to require players to download a mod to join it only for this. The vanilla game mechanics and survivor interactions would benefit from revisiting this.