Scrolling through some apps feels extremely jittery or laggy on iPhone with iOS 18.3.1

Scrolling in some apps feels extremely jittery or laggy, almost like its running at a lower frame rate. Some apps will be buttery smooth all the time, but others, like YouTube, Soundcloud, Instagram, Reddit, etc. will occasionally be super jittery. I say occasionally, because sometimes they will be silky smooth, but other times they run horribly. Apple can't even blame 3rd party developers for this because the EXACT same issue occurs in the App Store (and possibly other Apple apps, although I've noticed it in the App Store the most).

This tells me it has to be a deep rooted iOS problem. I've tried everything you can think of to fix this: Restarting, clearing the ram, uninstalling/reinstalling apps, resetting the phone and restoring from backup, but nothing has worked. The jittery scrolling genuinely makes me nauseous. I just don't understand why its smooth only sometimes. It obviously CAN run smooth, so why doesn't it run smooth all the time? My android phone runs buttery smooth 100% of the time so there's no reason that Apple can't make their phones do the same. I'm currently running iOS 18.3.1 on an iPhone 15 pro, but this has been a problem for a while now, even back in iOS 17. I have pretty much every single background process turned off, and the majority of the time, the jittery app is the only app I have open, so it can't be lagging due to a lack of processing power or because of having too many apps open or something.

Is Apple at least addressing this and working on a solution? I honestly don't GAF about AI or customization anymore. I just want a polished, smooth running, bug-free version of iOS and I'll be happy. The fact that I spend $1000+ on a phone that can't even SCROLL properly is outrageous.

Anyways, little rant over, if anyone wants to chime in with solutions or their own experiences, I'd appreciate it. Thanks in advance.