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

This happened long or shortly before they physically left.

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

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.

Are democrats inherently stupid or just lazy? They can Google " Ohio is investigating reports by residents that migrants are eating the local wildlife " why can't they seem to do the most simple things? Blind, ignorant, stupid or obtuse?

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.

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.

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

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You both are on polar opposites of the scale.

So, don't try to compete with them.

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 women stubbornly refuse to let men lead, even though they are attracted to the man, and the man both loves and desires them? Why do they get angry and blame the man when he gets fed up and walks away, when it's entirely their own fault?

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.

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.