I'm just playing along with the fiction at this point, so here's my response:

1. Order ISPS to switch off access to Google's servers and CDNs. Most internet traffic stops working as any website using a google CDN breaks, all analytics stops working, internet advertising breaks almost entirely, the internet is suddenly a less profitable and very scary, mostly unusable place. Google releases as its death-throes the fact that the ISPs are entirely to blame for this, gives coordinates of ISP offices and pitchfork emporiums. Customers revolt, UN issues a missive reminding the world that access to the internet is a human right.

2. Order power regulators to cut off their power - Pretty similar to above. Internet stops working very well, except Google continues to work in other countries, and suddenly it doesn't really make sense to do business in the USA. Google employees flee abroad where they can. Opportunistic countries take advantage of this and grant asylum.

3. Freeze their bank accounts - best idea yet, I think, except for I'm not sure how it would be implemented. Government order comes through declaring "Alphabet, Inc" to be entirely comprised of terrorists? Not sure. Either way, Google goes the way of Pablo Escobar and talks directly to bank VPs - "give us some of the money / give us a warning you get a freeze order / whatever, or we tell the world about your midget porn / location of all your private estates / your tax fraud." Alternatively, google uses its near total access to civilian populations to cast the US government as a totalitarian dictatorship issuing a coup against the American people's access to free information and fosters a revolution.