Not enough want to change their self is this correct grammar?

The grammar is not quite correct. Here's why and how to fix it:

* Missing Subject: The sentence lacks a subject (who is not wanting to change themselves). You need to add a subject to make it grammatically sound.

* Word Order: The word order is a bit awkward. It would be more natural to move "enough" to the end of the sentence.

Here are some ways to fix the sentence:

Option 1 (More Formal):

* Not enough people want to change themselves.

Option 2 (Less Formal):

* Too few people want to change themselves.

Option 3 (If you are referring to a specific group):

* Not enough of them want to change themselves.

The best option depends on the context and the specific meaning you want to convey.