i read maybe almost 2k? well... "read"... in the first few hundered it was ok, not bad, especially, imho, in the anime worlds im familiar with. some of the later ones were somewhat interesting too but only slightly and tbh after a while, maybe around 500 i started skimming... by around 1k i started skipping the entire "world action" arcs and just going to the "end game" "stat screen" to see whats new...
one thing that annoyed me especially is how every battle after a while mc would fight super powerful opponents that are seemingly\supposedly on paper much stronger than him and there didnt seem like there was particularly anything much he could use to guarantee him overcoming these foes yet everytime he just would~... reckless daredevil that could otherwise develop to a peak far surprassing predacessors of the same class ("profession").
the worst thing in these fight is mc always losing\super heavily damaging him hand - prolly off hand iirc? iirc mc is a sword dual weilder i think? might be confusiong abit... anyway iirc every battle its the same move - sacrafice his arm to block dmg or something and deliver final\critical blow or something like that...
other than that, well, author did kinda try to develop worlds and like an entire cosmology but its overshadowed atleast for me by the boredom of the repetetiveness of the dynamics happening to mc in these smaller specific worlds usually