Bit others are getting a very Gud battery after applying the tweaks.. Far more better than mine

Well, yes they do get better battery performance. lucky them.
We should just enjoy using our phone and stop worrying about it much. We can still charge it when the battery gets low.
I also got the script and enabled smartreflex. don't see much change. hehe but at least it didn't get worse. as long as it can last a day at moderate usage then I'm fine.