Stutters can vary on pc dude, not everyone has the same experience, i had super stutter on callisto ps4 and many people had none, i played a lot of games with much more stutter than sh2r, sorry.
the "my PC doesn't have this issue" argument... sure... or, you just don't notice it, which is fine... but if the best CPUs and GPUs on the market exhibit the issue, the others, less powerful ones, will exhibit it even more noticeably.
And didn't they fixed the stutter with the patches after launch?
nope. nothing was ever fixed.
Horizon fw use decima engine, considered one of the best if not the best engine out there and horizon at launch had a super oversharpened image in quality mode (that got fixed) and dogshit iq in performance mode (that got fixed), is decima a shitty engine because the game at launch had both modes that were half baked?
we know why both of these happened, and we know that they were fixed after people complained. they were very simple fixes and were instantly recognisably issues that happened due to dumb decisions by the devs, not due to how the engine works.
(sharpening filters are literally post processing that can be turned off with a single line of code, and the image quality in performance mode was down to the devs not using enough TAA sample frames to cover aliasing, another thing that can be changed without much of an issue)
we also had multiple other Decima engine games that were fine.
meanwhile SH2 stutters literally every single time you cross invisible loading zones, and it stutters every couple of seconds because it calculates delta time wrong.
these things can not be easily changed, and multiple UE4/5 games exhibit these exact issues.
in fact, the ONLY recent UE4/5 game that I know of that doesn't have streaming related stutters is Hi-Fi Rush. which probably gets away without issues due to it having very simple level layouts and very little asset streaming while traversing the levels.
UE4 was clearly designed with linear game design in mind, and breaks apart when you have an open ended design that requires dynamic asset streaming.
UE5 is basically just UE4 with a few extras, and inherited all the issues of UE4.
can these issues be overcome? yes, Gears 5 is proof of that. however Gears 5 was made by people who are better at making Unreal Engine games than Epic Games themselves, whose big Unreal Engine Tech demo title Fortnite, still has insane amounts of shader compilation stutters.
The Coalition are masters of Unreal Engine 4 and 5, so they know how to actually use it.
the problem here being that Unreal 5 wants to be the mainstream engine for everyone, while having so many inherent issues that you need to be an expert to properly use the engine without your game feeling like a stuttery pre-alpha mess