Missed texts and phone calls? How did you even get into the position where Google controls your telephony? Missed emails? Why are you using gmail.com? Third-party authentication? Did they not have the option to use e-mail or a username?
You can't fix every problem by band-aiding regulation on top of it. Sometimes you need to step back and wonder how you got here, and solve that instead.
Of course they do. Every strategic decision the company has made over the last two decades is to try to secure a monopoly on your data.
You make it sound like it's easy to run your own full stack of all web-connected applications. It's not. The cost is INSANELY high. So your real choice is whether to use one company, or dozens of individual companies for every individual service. The latter protects you against the risk of something like this happening. But it comes at a day-to-day expense which will far outweigh the prevented risk for 99.9% of people.
If Google wants to have a monopoly on all of that stuff, they need to be subject to regulation that compartmentalizes their services and what they can and can't do arbitrarily.