Is 'I don't like to make food by myself' grammatically correct?

Yes, 'I don't like to make food by myself' is a grammatically correct sentence in English.

There are several reasons why someone might not like to make food by themselves. It could be because they don't enjoy cooking or find it difficult, they don't have the time or resources to make food, or they prefer to eat out or have someone else make their meals for them.