Yes, It’s horrible, and can lead to minimizing any responsibilities you have. Even if you consciously want to accept a new responsibility/task, and have pre-planned how to do it well; Yet, you’ll struggle to keep the promise to yourself. Self-blame will only make it worse.

Near the deadline the brain has (at best) already done all the work subconsciously, and you only to manifest the thing into reality. Don’t doubt this, trashing the subconscious work is the worst thing you can do to yourself in a such situation.

(I’m not 100% sure I’m talking about the same subject, but anyway.)