Nah, he was an arrogant asshole, that was his biggest problem. “I’m too smart to be caught, so I’ll do something even more likely to fail just to show how great I am!” - I mean, the whole “all according to keikaku” to take down L was super convoluted and he only had to make that shit up because he wanted to show off how much of a big deal he was by killing the fake L live on TV
Light did only one (big) stupid mistake: trusting someone else with his power.
Nah, he was an arrogant asshole, that was his biggest problem. “I’m too smart to be caught, so I’ll do something even more likely to fail just to show how great I am!” - I mean, the whole “all according to keikaku” to take down L was super convoluted and he only had to make that shit up because he wanted to show off how much of a big deal he was by killing the fake L live on TV