I read too many of these to not take note of everything that's wrong!

A flat pancake bcuz this webtoon isn't about Mc's badassery, its MC's journey to 'How to mess up a established concept and genre with brainholes!'

Just some criticisms here and there:
Chap 1: Not "No matter how many times I regress, I couldn’t get used to it."
Should be "I regressed too many times, I'm so sick of seeing it."
You said so yourself that you were tired?! How did regression traumas fixed your optimism back?!
Chap 2-4: Really? MC monologues? DON'T BE LAZY AND DRAW SOME FLASHBACKS!
YOU'RE TRYING TO DEVOUR THE STORY TOO MUCH THAT YOUR PACING BECAME ANOTHER TYPICAL 2D CARDBOARD BORING!
Chap 6: So what happened to villain after? An influential person didn't even made a splash? HOW MANY SKIPS IS THIS?!
Chap 18: Bro, don't know where to get elixirs after 15 regressions? And he's humanity's savior?! Whoever put regression skill on this dude must be shaking his goddamn head.

Other things: SO WHEN'S THE WORLD GONNA END?! Thought you're handing the job to others yet there is no deadline? Are we just gonna pretend you're smart when everything else is dumb down? You know the future, right? Right? RIGHT?! You still want to save the world right? SO WHY EXACTLY CAN'T YOU JUST MONOPOLIZE SOME FUTURE RESOURCES AT THE PRESENT TO EMPOWER THOSE WHO DESERVE IT THAT HAS A HIGH PROBABILITY OF SAVING THE WORLD?! WHY NOT GO GET SOME STONES THAT INCREASES MANA, HP, STRENGTH, OR SOMETHING? WHY ARE WE DOING THINGS LIKE ITS A SLICE-OF-LIFE ABOUT BABYSITTING NOOB PLAYERS WITH TRAINING ARCS?! AT THIS POINT, IT FELT LIKE "I FAILED MY PREVIOUS REGRESSIONS BECAUSE IN THE EARLIER YEARS, I SPENT IT CHILLIN'!"
And again, why are we getting entangled with some guild just because you hate their attitude? We aren't even getting flashback about your previous regressions, so why are you jumping all over the plot? WHAT EXACTLY DO YOU WANT ESTABLISHED AFTER SAYING YOU WANT TO RETIRE?!

Anyway, bro can sucker punch rankers with an E stat and gearless. How fast is growth rate again when he's stuck training others and now rarely grind? Yep, the sytem must be dead. And constellations? They're just names with free gifts *laughs sarcastically*.

And yes, its introducing the characters but we don't really care. Why?! BECAUSE A ONE SENTENCE IN A BUBBLE SPEECH LEAVES NO IMPRESSION WHATSOEVER!! The artist focused too much on physical background and obviously not good at atmospheric and abstract backgrounds like exag facial expressions, silhouettes, some representations to add more depth.

So much for that, its good---when you're bored and doesn't want to think shutting your brain while skipping all trivial details or at this point, 50% of the plot