[rdmuser]

In my experience the best way to improve budget/old android phone performance is to disable as much random preinstalled crap as possible. Some stuff you can't disable directly through phone settings so you need adb. My phone is a budget phone from over a decade ago now and still going strong.

I liked using this software last time I was doing that to my ancient phone and have had zero issues using the preset lists to disable stuff. No updates in the last few years though so might be worth doing a little extra vetting before use. https://github.com/0x192/universal-android-debloater