The problem is that instead of using widely documented and implemented web languages that are built into the browser and can run natively without a translator, unskilled web devs opt to use random web modules provided by adware vendors to simplify the implementation of complex animations, fonts, and UI/UX and "vibe" coding functions. This modules are not often built for memory management and garbage collection (the opposite actually)
But I mean, you're part of the problem by heavily utilizing the same LLMs responsible for suggesting the use of ridiculously heavy modules ran at every page load and bloated front ends instead of fostering skilled programmers who write things from scratch, improve them over time, optimize them because they actually care about resource management, etc...