Block Collision Sliding off

I made an earlier question but I think i found the problem. but you guys are more experienced then i am so I'm just going to give the script for it.

using UnityEngine; using System.Collections;

public class BlockCharacterCollision {

 public static Contact? GetContactBlockCharacter(Vector3 blockPos, Vector3 pos, CharacterCollider collider) {
     Contact contactA = GetClosestPoint(blockPos, pos+collider.bottom);
     Contact contactB = GetClosestPoint(blockPos, pos+collider.top);
     Contact contact = contactA;
     if(contactB.sqrDistance < contact.sqrDistance) contact = contactB;
     
     if(contact.sqrDistance > collider.radius*collider.radius) return null;
     
     Vector3 dir = contact.delta.normalized * collider.radius;
     Vector3 capsulePoint = contact.b + dir;
     contact.b = capsulePoint;
     return contact;
 }
 
 private static Contact GetClosestPoint(Vector3 blockPos, Vector3 point) {
     Vector3 blockMin = blockPos - Vector3.one/2f;
     Vector3 blockMax = blockPos + Vector3.one/2f;
     Vector3 closest = point;
     for(int i=0; i<3; i++) {
         if (closest[i] > blockMax[i]) closest[i] = blockMax[i];
         if (closest[i] < blockMin[i]) closest[i] = blockMin[i];
     }
     return new Contact(closest, point);
 }
 
 

}

Hopefully, I wont, have to go on a journey to fix this, because I really can't go forward with this addition/abomination/bug