No, they got it by Gmail being a loss leader paid by Google AdSense in the search engine. Now they have AdSense in Gmail directly, so I guess it pays for itself.
AT&T was once broken up and then after that you could connect a modem to a phone line. The whole public use of the Internet is a consequence of breaking up a “superior product” that became a bloated market incumbent resting on its laurels.
No, we should be mad at Google or any other BigTech taking over a big enough chunk of a federated system to basically dictate what can be sent/received and what not. With no human in the loop if you don't agree with their decisions.