There's a sudden wave of de-exciation which pierces your head out of nowhere and manipulates you to the extent that you start believing in the fact that you aren't being progressive at all. It can be fine if it acts like an alarm with the mild sound, that wakes you up to the realization of something. But if it crosses those limits, existential crisis takes place. Like, you see something really good and instead of appreciating it, you start to devalue yourself for not reaching that level.
This feeling of being extremely inferior and doubtful about your existence is just like a parasite which resides in your body. The more you grow the thought of it, the more it damages you. That person who used to think that his today has been better than the yesterday, gets his brain stuck in (not even yesterday, but) the day when he was able to do nothing and the upcoming days get inspired from that very day and ultimately lead to zero productivity and nothingness for a longer period of time.
The funny thing is, these fancy worldly idols, who we look up to, have also been through this phase or maybe are going through this, but they don't disclose it. Once you have this fame and exposure, you can barely express the real you because of the sky-kissing expectations of the people from you since they sketch you with the ink of ideality. That's one bad thing about success, or can be good, circumstances vary.