Psalm 55:12–14 describes one of the most specific forms of betrayal in Scripture: "For it was not an enemy that reproached me; then I could have borne it... But it was thou, a man mine equal, my guide, and mine acquaintance. We took sweet counsel together, and walked unto the house of God in company." David's deepest wound was from a companion with whom he had worshipped. The wound from within the community of faith is not more disqualifying than other wounds — it is more specifically named in Scripture as one of the hardest.
Hebrews 10:25 — "not forsaking the assembling of ourselves together" — is often used as a correction for church avoiders, but its context is important: it is written to people experiencing persecution and social pressure to leave the faith. The reason to stay in community is "the day approaching" — eschatological urgency. The command is not that every institution that calls itself a church is safe or healthy. It is that the practice of gathering is something the day approaching makes important.
Commentary is from a charismatic Protestant perspective, drawing on KJV text and public-domain sources including Spurgeon, Andrew Murray, and Matthew Henry.