If you are stuck with an H616 Android device and want it to be "better," your best bet is modifying the existing software rather than replacing it.
Stock ROMs are often cluttered with unnecessary apps that hog RAM and CPU cycles. allwinner h616 custom rom better
Custom ROMs often improve performance by: Removing background bloatware. Using lightweight system UI. Optimizing RAM usage. Prizm Institute Making Allwinner H616 run armbian OS 25 Aug 2024 — If you are stuck with an H616 Android