Hogwarts: Break off the engagement at the beginning and marry Hermione at the back end

I'm referring to Neville's premise here.

When Neville was a child, Algie (his uncle) wanted to force him to show off some magical abilities.

At one point he pushed Neville off the Black Lake docks, nearly drowning him.

At the age of 8, he hung Neville from an upstairs window with his feet and neck, and by mistake dropped him, Neville bounced off and flew across the garden and onto the road. This made the whole family happy. He was so happy that he bought Neville the Toad Reefer.

This means that Neville has not shown the slightest sign of a magical riot, which is why it is considered a squib.

Whereas a magical riot refers to the complete awakening of magic after being stimulated, rather than hiding in the body.

And the protagonist's family suspects him as a Squib because he hasn't had a magical riot (late).

Generally speaking, pure-blood families are three years old when magic riots and then will ride a broomstick, do not like pigs, etc

As a pure-blood wizard, the protagonist has not shown the corresponding talents, so he is considered a squib.

There's also the Squib setting.

According to Rowling's setting.

Although Squibs cannot use magic like Muggles, they are usually better integrated into the wizarding world.

Because Muggles can only be Muggles, with all the qualities of the Muggle family and the Muggle world.

The biggest difference between Squibs and Muggles is that Squibs are related to wizards, they just don't have magic.