Heโs such a multilayered character, however itโs overshadowed by the way his character is presented and the fact there are other and more important characters to focus on.
His devotion to his art makes him a strangely sad or bittersweet character. His concept is unique and contrary to the most common and popular concept of art; something long lasting.
Deidaraโs art is centred around the present, a single moment that can only be experienced once. The present is fleeting, every second that passes is something you canโt get back. A single moment of impact that ensures no future and the destruction of the past; an explosion. Deidaraโs art is not only an explosion itself, but both the destruction it causes to whatโs in its path, and the destruction of the clay sculptures he uses as its foundation. His art isnโt focused on the past or future. It ensures a single moment in the present (explosion) of destruction (erasing the past).
Considering how the Narutoverse is set around wars and generally full of violence, it would make sense for the art pieces of that verse to be based around telling stories of the wars or advertising for a better future (like Jirayaโs original works), Both of which are based on the past and the future.
Itโs easy to see how Deidaraโs art would be viewed as โunartisticโ or โunappealingโ. Contrary to popular opinion, Deidara is a smart character who understands other people and how they work. So considering that, why does he seem to assume people look down on him and his art even when they donโt say anything negative (ect; Sasuke, Itachi)? Maybe itโs because of the lack of recognition heโs received. Heโs hates people who donโt recognise his work, because thatโs what everyone does.
The path of an artist is a path of misery. Most people see artists as people who create, however Deidara is someone who destroys. So what does that make him, in the views of others? Caring about the opinions of those who differ than you is nothing but demeaning. So itโs better to simply view yourself as superior. Youโre right and theyโre wrong. Deidaraโs art is true art, and nobody elseโs is. To me, the scene where he aggressively refused his own admiration in Itachiโs abilities, is a clear indication of insecurity and doubt. If he acknowledges someone who doesnโt even share his views on destruction, then heโd be denying the certainty in his own art and be saying โmy belief and concept can be beatenโ.
This is why I believe him to be bittersweet character, whether he himself knows it or not. Heโs complicated, maybe because heโs so simple at the same time. Yeah, heโs this short angry blonde dude who likes art- but itโs because of the fact heโs present as that and nothing more, which makes him feel complicated once you actually look at him.
Naturally, this is my perception. I havenโt even read his offical wiki pages or whatnot, so maybe I just completely bullshitted this because Iโm desperate to ramble about this stupid guy. Hell, Iโll probably change my opinion on him by next week ๐ญ anyway I hope someone found my yapping interesting. Please donโt come yelling at me if you disagree.