They're spread too thinly
This is being typed on a Chrome browser, oddly enough, but I also have Firefox, where I do my, "secure," browsing because I can control cookies much more closely.
Google have fluffed everything up. Their UK spell checker on Docs is a joke and despite showing this to one of their engineers last year, it remains critically broken. They keep faffing around with the YouTube communities and their push to Red has effectively ripped the "you" out of YouTube. They show no sign of slowing this down, or actually like, listening to the community itself.
When given the choice, people are preferring to work in MS Office and, "upload," to Docs spaces rather than edit in docs itself. I can't reveal how I have come to this conclusion, for obvious reasons. Their Chromebooks lack key navigation buttons which makes them awkward to use, and rely on internet connections which is still a case of, "dream on," in the UK. Even the local synch is stuffed, especially with cached docs which are also collaborated on.
ChromeOS and Chrome appears to be a shifting tide and a perplexing combination of banning adverts while still managing to milk money from the advertisers. This appears to be a gravy train that isn't going to last forever. From where I'm sitting, there is a light at the end of the Google Tunnel.... but it's the light of a nuclear explosion which isn't far off hitting.
Oh, and apps can't be passed between accounts, so if you change e-mail address, then you've got a problem. I landed that one at Google's door a few months ago and have heard nothing.
There's also the issue that if you link your hangout to the wrong Google account, (because they usually all have the same icon, unless you've been smart beforehand and used different avatars for personal and work Google accounts) then you can't undo it. And good luck getting help from Google with that one.
I could go on... but Google services are an almighty mess from the consumer angle. I have a Chromecast as well.... it's sitting in a drawer, never to be used again.