My ex moved on so fast. How can I overcome the pain?

On their side, there has been a process of emotionally and mentally checking out while you were still together and while you were under the impression that everything is cool.

So, don't try to compete with them.

This happened long or shortly before they physically left.

How did Madri, mother of Nakula and Sahadeva die?

You both are on polar opposites of the scale.

And during this process, they either started seeing someone new who they planned to secure as their rebound option or were busy creating their post-breakup plan.

I.e. you thought that you had the perfect deal whereas they had already made up their mind and just weren't as emotionally invested in it as you were.

Why do so many men wait until they are retired or close to it to start having sex with Men? Most of them say they have always wanted to suck dick or be fucked. Why did you wait?

Instead, focus on taking care of, solving and healing what you are experiencing right now.

Simply put, because they have been prepared and you weren't.

This is why you can't expect them to feel anything close to what you're feeling right now, because you and them are on a completely different stage in the healing process.

You found a love potion, and your friend tried to use it on an attractive popular girl, but he accidentally dropped it on the neighbors dog. Now the dog won't stop following him. How would you help him?

What they do doesn't matter and it's completely irrelevant to your healing process, though it’s valid to hate and judge them harshly for leaving the way they did.

This is why comparing yourself to them in terms of the healing process isn't going to help you in any way, shape or form.