Why are the forum post formatting capabilities so poor?

When I write a sentence and presse ENTER I get a new line in the editor, but not in the post itself. Instead, as the little help window says, I have to type TWO SPACES:
Now I got a new line. But how to get a space between the lines? One could use html tags (like br, what I cant show here, because even within the code brackest its removed by the text conversion):
Oh wait, the space between new lines only works if I write a blank line into the editor and then add the html tag in the next line:

Here we go.

You can also add code snippets in the editor:

 if(true) {}

Which is a bit hard to edit in the editor window, but it can be handled. But what if I want to post code after a listing?:

• text 1

• text 2

  using System.Collections; using System.Collections.Generic; using UnityEngine;

  public class TestScript : MonoBehaviour {

     // Use this for initialization
       void Start () {
           
       }
       
       // Update is called once per frame
       void Update () {
           
       }
   }
   
  
  

No matter how many blank lines I add prior to the code block, it gets messed up! It only works if I put a br html tag inbetween:

• text a

• text b

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class TestScript : MonoBehaviour {
 
     // Use this for initialization
     void Start () {
         
     }
     
     // Update is called once per frame
     void Update () {
         
     }
 }
 

Conclusion

This forum post editor is the worst editor I ever encoutered! How do you expect people to post high quality answers and questions with this? DO SOMETHING!