Your issues (save for Spotify) bread very much like my own list of personal gripes when I try to move to Android, so your is quite reasonable and spot on, IMO.
HomeKit and the Home app are far more seamless than any other smart home integration. I use a LiftMaster garage door opener as well and it’s integration with HomeKit is terrific. To integrate with Google Assistant there is a monthly fee
and its functionality is limited comparatively.
I have the same issues with Reminders/Tasks/Lists, especially in regards to how easy it is to add items via my Apple Watch.
I have plenty of experience using 1Password on both platforms and its integration on Apple, especially in iOS 12 is much better. Same goes for Apple’s very own solution (Keychain) with works across devices.
I have no experience with Samsung Health but Apple Health ties in nicely to tons of third party apps and devices and is much more robust than anything Google offers.
So again, I know exactly where you’re coming from.