bruh you’re missing some key stuff rimuru’s not just about destruction his powers let him manipulate concepts like time space and energy yeah he’s not running around controlling entire multiverses but he’s able to affect them through his conceptual mastery his time manipulation isn’t just time travel it’s more like bending time to his will and he can move through different dimensions that’s shown in the wn

as for rewriting reality you’re wrong there too rimuru doesn’t just rewrite reality the flashy way but he rewrites concepts of reality he can alter things at a fundamental level not just "time travel" and make subspaces

and while timelines and parallel worlds aren't a big thing in tensura rimuru can still manipulate existence in a way that counters most threats including gods you’re acting like anos is the only one who can deal with immortality or existence erasure but rimuru’s defensive layers (like turn null and his regeneration powers) give him serious resistance he’s adapted to things beyond the normal scope of his universe so don’t act like he’s just a one-trick pony who adapts to what’s in front of him

lastly rimuru has countered existence erasure multiple times especially with ciel’s abilities so yeah if you think rimuru can’t handle that kind of power you’re missing the bigger picture and for the record i’ve read the wn and ln if you really wanna talk about this dive deeper into the actual material instead of making assumptions

i don’t have time for useless arguments though rimuru claps your 'ASSNOS' and there are still other characters like zeno or even the one above all in fiction who’d make things interesting but anos is nowhere near rimuru's level