Why do People Hate on Crossbow Expert?

[Regulas]

You seem to be ignoring "You can take a bonus action only when a special ability, spell, or other feature of the game states that you can do something as a bonus action. You otherwise don’t have a bonus action to take." The feat in question grating the bonus action states "When you use the Attack action and attack with a one handed weapon, you can use a bonus action to attack with a loaded hand crossbow you are holding." No using the attack action and attacking with a one handed weapon, no bonus action on that turn.

Nowhere does that say it has to be on the same turn. Literally nowhere. And to Morbo yes I am dead serious, it's not different then the logic that lets you fire off the same bow later in the turn after changing the conditions.
For that matter why can't I phase through walls and steel? The rules in the PHB only would make it count as difficult terrain.

The feat also let's you ignore the loading quality.

What does the loading quality have to do with being loaded. The quality just says that you can only reload once per turn so the feat just means that you can potentially reload more then once, it doesn't say anything about not needing to load ammunation.