The notifications are flooding you because you turned them on or were on by default. If you go to your Kbin’s settings at the bottom of the page there are two checkboxes for subscribed magazines’ notifications. Just turn those off.
Also, make sure you set your homepage to your subscribed magazines and you’ll be good to go.
And about the other stuff, it’s not just about having a desire to be taken care of without having to lift a finger. I don’t care about having to learn how all of this fediverse stuff works because it’s fun for me, but that isn’t the case for the overwhelming majority of internet users that genuinely have zero problems with the platforms they use, and barely use. For example, my 70 year old parents barely know how to use YouTube and that’s the place they use to consume and discuss the topics they care about. I tried to teach them about Reddit and other forums, but it’s simply unnecessary when the reliable and easier thing already exists.
Same thing when you expect someone who uses their computer because of 2 or 3 applications, to ditch MacOS and all their neatly integrated hardware, to then spend hours and months on end to craft themselves an OS with Linux in which none of their specialized hardware works anymore.
Also, a ton of teenager to middle aged people will think the same about the Fediverse, when Reddit, Twitter, Instagram, Tumblr and other websites already provide them the platforms they need to express themselves and are "too casual" on those, to genuinely not have an issue with the platform itself. All of those users have valuable inputs and content to offer to the platform, and we’re not going to have them here, just because of how complex this platform is not only on paper, but in infrastructure ie: search engines are going to have a terrible time indexing the Fediverse, the content is mirrored in some instances but not EVERY piece of content is, and not amongst all instances, etc.