That's just not even remotely true.

After the PRISM stuff, folks got a lot more savvy with encryption. TLS has been tightened up a lot since then across many fronts (perfect forward secrecy, removing crap roots, certificate transparency, etc).

There's just no way the NSA can be MITMing any reasonable proportion of traffic. Possibly extremely targeted stuff, and sure, there's technically the possibility that Google is handing over keys, but if it was happening at any massive scale, people would now know.

That's why the fight has moved over to metadata now, which is what the three letter agencies are vacuuming up these days.