Nobody is sincere, all discussion is trying to get a one up on someone with thought terminating cliches to shut them down and keep up their fake social media character

I don't actually think you're describing something new. Sartre discusses this, summarised reasonably well on the wiki https://en.wikipedia.org/wiki/Bad_faith_(existentialism)

In existentialism, bad faith (French: mauvaise foi) is the psychological phenomenon whereby individuals act inauthentically, by yielding to the external pressures of society to adopt false values and disown their innate freedom as sentient human beings.[1] Bad faith also derives from the related concepts of self-deception and ressentiment. Freedom and choice

A critical claim in existentialist thought is that individuals are always free to make choices and guide their lives towards their own chosen goal or "project". This claim suggests that individuals cannot escape this freedom, even in overwhelming circumstances. For instance, even an empire's colonized victims possess choices: to submit to rule, to negotiate, to commit suicide, to resist nonviolently, or to counter-attack.

Although external circumstances may limit individuals, called facticity, they cannot force a person to follow one of the remaining courses over another. In this sense, the individual still has some freedom of choice. For this reason, an individual may choose in anguish, fully aware that this will have consequences. For Jean-Paul Sartre, to claim that one amongst many conscious possibilities takes undeniable precedence (for instance, "I cannot risk my life, because I must support my family") is to assume the role of an object in the world, not a free agent, but merely at the mercy of circumstance (a being-in-itself that is only its own facticity, i.e., it "is" inside itself, and acts there as a limitation).[2] For Sartre, this attitude is manifestly self-deceiving.

[...]

Examples

Sartre

Sartre cites a café waiter, whose movements and conversation are a little too "waiter-esque". His voice has an eagerness to please; he carries food rigidly and ostentatiously; "his movement is quick and forward, a little too precise, a little too rapid".[4] His exaggerated behavior illustrates that he is play-acting as a waiter, as an object in the world and as an automaton whose essence is to be a waiter. That he is obviously acting belies that he is aware that he is not (merely) a waiter, but is rather consciously deceiving himself.[5]

Another of Sartre's examples involves a young woman on a first date. She ignores the obvious sexual implications of her date's compliments to her physical appearance, but accepts them instead as words directed at her as a human consciousness. As he takes her hand, she lets it rest indifferently in his, "neither consenting nor resisting – a thing"[6] – refusing either to return the gesture or to rebuke it. Thus, she delays the moment when she must choose either to acknowledge his intention and reject or consent to his advances. She conveniently considers her hand only a thing in the world and his compliments as unrelated to her body, playing on her dual human reality as a physical being and as a consciousness separate and free from this physicality.[7]

Sartre suggests that, by acting in bad faith, the waiter and the woman are denying their own freedom by using their freedom to do so. They manifestly know they are free, but are actively choosing not to acknowledge it. Bad faith is paradoxical in this regard; when acting in bad faith, a person is actively denying their own freedom, while relying on it to perform the denial. However, Leslie Stevenson believes this characterization of the waiter itself as being an example of bad faith is a misrepresentation of Sartre's intentions.[8]

I think you're having an existential crisis about authenticity and mask wearing and existentialist philosophers is your answer to this, it won't make it go away, but better understanding it might take the edge off.

How do I escape it?

I don't have an "escape" for it, besides fiction, videogames, etc.

I do think it's very healthy to pursue being authentic and unmasked though, and to desire it in others. Provided everyone doing so is also pursuing being good people.