>>410788962 hours is generous, it's barely over 1 hour. SM had a 2 hour postgame and that had you catch UBs and expanded on one of the islands for a brand new area. Other games like ORAS added a ton of new Pokemon to catch when you finished the E4, SWSH does neither of these things.
There are no new areas for you to uncover, no new Pokemon either. You do the like 5 battles, get the box legend and you have literally nothing else to do except do Raid battles and Battle Tower. It's pathetic.