One sentence, built on a fourfold ἀλλήλων / ἀλλήλοις. The reciprocal pronoun stands in each of the four limbs: they despise one another — they curry favour with one another; they wish to surpass one another — they bow down before one another. There is no "some… others": these are not two classes of men but the same men in two movements at once.
Two verbs that occur nowhere else. ἀρεσκεύομαι — "to play the toady" (from ἀρέσκω, "to please," in a form coloured by ingratiation rather than mere obligingness) — and ὑποκατακλίνομαι, literally "to lay oneself down lower, beneath": a word from the world of dining couches, where one's place declares one's standing. Neither is about politeness; both are about posture.
What is actually said here. Not "people are hypocrites" — that would be a moral reproach. What is said is harsher and drier: contempt and flattery are one movement, and so are ambition and servility. Whoever wants to stand above has thereby already accepted another's scale, and is therefore already below. Hence the discipline: the passage works not as an accusation of others but as an analysis of DOGMAthe mechanics of the chase for pre-eminence itself.
Its place in the book. It stands immediately after 11.13, where Marcus answers another's contempt and hatred. There, how to bear yourself when despised; here, what that currency actually is. Cf. 10.19, where arrogance is set between two servitudes, and 9.34 — "strip their little souls bare." The governing discipline is assent, the sustaining one action.
On the state of the Russian text. See the footnote1: in the electronic source Rogovin's line is damaged by faulty OCR — pieces of words dropped out at the line breaks. It is restored here from an independent printing of the same translation; the Greek and Long are intact and confirm the reading.