...As somebody who's used to level limits of 10-20 or even less, 50-60 at most and treating each level up as an achievement, levels on
four freaking digits and jumping several hundreds on one go feels very cheap and like the author doesn't actually know what levelling stands for...
Tbf, MC just one shot (though not really how his skill works) an enemy that's easily destroying a battalion of high level combatants and heroes.
If the big bad of the day can summon thousands of high level enemies, I really sure hope he gives an equivalent amount of rewards.
And levels here really isn't similar to levels in DnD, action rpgs or some highly competitive games. One whole level in dnd can make an already amazing wizard into a spell slinging weapon of mass destruction.
Here a level can vary from a few negligible stat points to a bit more, but still negligible amount of stat points.
Like, have you seen the MC's stats? He doesn't get much except for his MP.
This story is based on the games where you grind for hours getting to level 100 so you can barely get to the start of the actual content where the level 300 new game+ players gather.