Extremely.

But he was also narcissistic enough to basically drop hints the whole time, even as he actively hides. While he knows he needs to stay hidden, he yearns for everyone to know that he is Kira, and to worship him for what he is doing.

He wants to openly taunt his detractors while never giving them actual evidence, but that’s stupid as fuck.

He nailed the lie to start, but fucked himself because of his arrogance and ego.

Yes, but his hubris and ego had him make stupid and sloppy mistakes.

If anyone other than L started that investigation, Light would have won.