All large sites regularly get attacked.

The average skiddie’s motivations are that they’re bored. So they DoS a site they use regularly just to see.

Heck they generally don’t even mean to cause damage per-se, and just think it’s a funny use of their evening.

You have to stop thinking DoS attacks are always particularly personal. They really often just aren’t, and it’s a monumental pain in the ass to be on the receiving end.