Yes, we hate writing them. Yes, they’re required.
The links on this page take you to posts/articles about writing a book blurb or synopsis. The difference between the two types of summaries is that a blurb is typically for a reader and a synopsis for an editor or agent. Some use the terms interchangeably, so I’ve got links to both here.
Writing your blurb or synopsis will still make your head explode, but maybe reading these articles will give you the feeling that there’s a secret trick to it you can master. There isn’t, but even the illusion of making this hideous exercise in torture easier is a plus.