I'd expect a political hit piece to dive into Exxon's record in Russia given the current geopolitical tensions. Those include, for example, ex-CEO Rex Tillerson's meetings with Russia's fossil fuel czar, Igor Sechin, Exxon's role in building the technologically advanced Sakhalin natural gas project and its LNG export system, etc. For anyone interested in that history, Steve Coll's "Private Empire: ExxonMobil and American Power" has a whole chapter on it:
https://www.goodreads.com/book/show/13372977-private-empire
See also stories like this (2011)
> "Where BP had planned to swap stock, Exxon, which is based in Texas, agreed to give Rosneft assets elsewhere in the world, including some that Exxon owns in the deepwater zones of the Gulf of Mexico and on land in Texas. In announcing the arrangement at a surprise signing in the Russian resort town of Sochi, Prime Minister Vladimir V. Putin described a sweeping global alliance — and a potentially vast investment by Exxon in the Russian Arctic."
https://www.nytimes.com/2011/08/31/business/global/exxon-and...
As far as work culture, I can't imagine Chevron being any worse that Exxon, and descriptions of Facebook's internal pressures on employees don't seem all that different from Exxon's.