Like I mentioned many times before, Samsung should better be doing something to improve on Samsung Experience. As promised by Samsung themselves, they plan to make Samsung Experience "as close as possible" to stock android. Everyone knows that Samsung heavily laces stock android with their own apps and features which makes the whole experience more enjoyable (to some people) but then again this "Bloats" the whole ecosystem.
The problem lies in Samsung's own native apps and features are running constantly in the background, collecting user data, location etc and this is working concurrently with Google's own apps which are doing the same. With both sides from Google and Samsung that are constantly running in the background, this explains the bad battery life and battery drain on Samsung phones and this has been an issue ever since.
If Samsung is still adamant on running their own ecosystem, there would be no end to this issue and hence that is why I wont use a Samsung as my daily driver (though I would own one). There are just too many issues, some big and some petty ones which annoys the heck out of me.
Some users have resorted to purchasing certain apps to disable many native Samsung and Google apps on their phones but this actually destroys the whole user experience if you ask me. We pay so much good money for a flagship, I want it to work right out of the box. No need for tweaks here and there.

Samsung's own Exynos chipset also seems to be part of the issue. Somehow or rather, SD always have a 'better' chipset that outperforms the Exynos in both performance and battery life.

Samsung has to come up with a better FW and better chipset for an overall better user experience.