The author aims tries attempts

Think about this for a moment and ask yourself whether it makes sense to say that an author "aims" or "tries" or "attempts" to do anything. After all, the author's intentions are embedded in the text, which is all we have got, but which should be enough. So, unless the author has failed in some way, we should talk about the only thing we can talk about meaningfully, which is the text.

Forget about what you think authors might have been trying, aiming or attempting to do when they wrote the words that you are supposed to be analysing. You have the results of the attempt, namely the text. Talk about that rather than speculating about the authors' intentions.

The real problem is that when you do this, you are implying that the writer has failed in their mission. Consider  the following handful of examples,  in which the second critical part of the sentence seems a natural consequence of the assignment of terms of endeavor and effort to the author. All the sentences therefore refer to authorial failure. 

1. In her novel, the author attempts to explore the complexities of human relationships through her characters' interactions, but her heavy-handed use of symbolism often detracts from the authenticity of their emotions.
2. The narrator seems to be trying to create a sense of foreboding in the reader by constantly hinting at an impending tragedy, but this predictability ultimately diminishes the impact of the story's climax.
3. The author's aim to subvert traditional gender roles in her protagonist's portrayal is admirable, but her reliance on stereotypical characterizations of supporting characters undermines this effort.
4. The narrator aspires to convey the harsh realities of life in the inner city through his vivid descriptions of poverty and violence, but his constant use of profanity and graphic language may turn some readers away.
5. The author's attempt to weave multiple storylines together into a cohesive narrative is impressive, but the sheer number of characters and plot threads can make the story difficult to follow at times.