It doesn't change the damage scaling of your weapons - if you have low ammo you're still not going to get through a boss fight. And
@Alxmir23 is right, if you reload your saves there is no alteration made to the amount of damage you take either if that's how you want it.. it's only adaptive when you choose continue. I can understand wanting to see him ragequit the game of course but you don't need to make out like hardcore is babymode or something.. I've put 12 rounds into a zombies face and it still gets back up. 3 shotgun rounds and they still come after you at times. If you're playing "well" the game is out to fuck you over at every turn. He just got through it the same way he always does - blunt force chat hand-holding halfwit attrition.
REmake 2 is alright but it has some issues like y'know, every other videogame out there which includes (and is not limited to) its tightrope walk when it tries to balance the old school tension with the modern need to keep pushing ahead diligently. Either way this is the first playthrough in a long while I'll actually watch of his and look forward to seeing him get salty over since it sounds like it was pretty good in that regard. Whether you like the game or find it overrated.. Phil's shitty playthrough will bring us all together to point and laugh.