Procedural quad, problem with texture

Hello I have a problem, I have created a quad in runtime (it's not a single triangle, acually there are two vertices in the left) and I have attached a material with the following image.

This is the result:

If I make a perfect square the result is good tho.

Some code:

 void Start()
     {
         go = new GameObject();
         go.transform.parent = null;
         go.transform.position = Vector3.zero;
         go.transform.rotation = Quaternion.identity;
         go.AddComponent<MeshFilter>();
         go.AddComponent<MeshRenderer>();
     
         mesh = go.GetComponent<MeshFilter>().mesh;
         renderer = go.GetComponent<MeshRenderer>();
         renderer.material = material;
         renderer.castShadows = false;
         renderer.receiveShadows = false;
         uv = new Vector2[]
         {
             new Vector2(0, 0),
             new Vector2(0, 1),
             new Vector2(1, 0),
             new Vector2(1, 1),
         };
         
         triangles = new int[]
         {
             0, 2, 1,
             1, 2, 3,
         };
         
         vertices = new Vector3[4];        
     }
         
     Mesh CreatePlaneMesh(RaycastHit hit)
     {
            vertices[0] = -transform.forward * startHeight;
         vertices[1] = hit.point-transform.position - transform.forward * endHeight;
         vertices[2] = transform.forward * startHeight;
         vertices[3] = hit.point-transform.position + transform.forward * endHeight;
         
         mesh.vertices = vertices;
         mesh.uv = uv;
         mesh.triangles = triangles;
          mesh.RecalculateNormals();
         return mesh;
     }

I'm drawing the vertices like this:

 0---------------1
 |               |
 |               |
 2---------------3