I thought I could deal with the Samsung crapware anyway, coming from iPhone and having used a OnePlus One with Cyanogen and later lineage... Boy, I was wrong, beautiful hardware for sure but the OS is utter garbage.
By garbage I mean: Bixby is unwanted and disabled, but it still pops up nearly constantly.. essential features of the phone require a samsung account, in an attempt not to sign up for it I get notified weekly that I must have one.. samsung programs will randomly notify me about random things that I have no interest in knowing about. Especially samsung pay- I DO NOT WANT AN OFFER ON COFFEE JUST LET ME USE YOU TO BUY THINGS. Upday has a pre-loaded list of the worst british newspapers, and insists on telling me about "breaking news" regarding a nice young american lady who is marrying one of our princes...
I miss my phone being in my control, and that's what everyone who was selling me on android was telling me was compelling about the platform.. But I had much more control of my phone when I was with Apple.
(And yes, I donated heavily to the LineageOS+S8 effort)
You can already see some benefits of this on the XDA website, where some people are successfully replacing system images on no name phones with barely any audience and not even a kernel source published
But it won't help if the bootloader's locked
I had to look up what Upday is. It's not installed on my S8, although I could download it from the play store. If you don't like it just uninstall it.
Samsung Pay isn't available in Norway, so I don't have it on my phone either. So I guess you could always disable it.
And the Samsung account... Well, it's the same as a Google account. The system is going to complain if you don't have one. Otherwise disable all the Samsung stuff.
Sincerely: Accidentally swiping left on the home-screen. Happens a lot, sometimes it'll just open it without me swiping left while unlocking the screen...