I doubt Jeff bothers with envy. He's a competitor, and he doesn't like being #2. In his mind, he may well assume that he's #1, and that if anyone else is claiming to be #1 then they're somehow cheating or doing something reprehensible. Like polluting the environment. From what I've seen, people as motivated as Musk and Bezos are a pretty weird bunch.
I wonder how the CO2 emissions work out per kg of payload. Large rockets are supposed to be more efficient, but that probably only applies when used at their maximum payload. Launching 10 tons with Starship is probably much worse than launching 10 tons with New Glenn. We need to be packing every kg of payload into these rockets if we want to have minimal impact on the environment. That amortizes the mass of the rockets themselves.
Perhaps SpaceX should suggest to the government that dumping rocket hardware in the ocean after each launch is bad for the environment.
I suspect that however he deludes himself, in moments of honest clarity he knows he's behind. I'll give you the "weird" though...
All of that having been said, apparently the folks within the potential blast radius would have to vacate whenever Starship tanks up, which would seem to affect ULA moreso. At the cadence SX could be running at, I could see where that would get to be a pain...