Hey there @Flame!
Considering you said it’s working and the player is sliding, I’m assuming you setting the walkable angle there basically makes it impossible for the player to get their footing. So friction doesn’t apply because the surface is not walkable. This type of sliding is best used if you are trying to make sure the player just falls down a steep side wall, like in Mario64.
If you were to try and use this slide as anything else you’re going to lack control over it. If you want to clamp the velocity and that’s all, this example will do just fine.
I advise only clamping the velocity while sliding. Or if you’re prefer to just dampen it you could use linear dampening but that will change how your actor moves in total until set back.