The apostle's words about the conditions in which he himself and his fellow believers have to live and bear witness may appear to be a declaration of heroic resistance, the words of heroes opposing the whole world and ready to fight to the victorious end. Perhaps that is how it would be, were it not for one "but." Paul understands perfectly well that here, in a world being transfigured but not yet transfigured, and therefore still lying in evil, they will not win.
Of course, this does not lessen the heroism: heroic death is known to history. But the apostle evidently sees meaning not even in victory, possible or impossible, but in the very fact that, despite all the efforts of the evil in which the world lies, they have still not disappeared from this world; they are still here and continue their work, their witness.
Such logic, from the point of view of the laws of the untransfigured world, appears somewhat strange and at the very least unpromising: after all, the witnesses will not be able to turn the situation decisively in their favor anyway, and if so, what is the point of all their efforts?
But from the point of view of the Kingdom everything falls into place: from this point of view it is completely obvious that until the final triumph of the Kingdom and the complete transfiguration of the world, it will indeed be impossible to change the state of affairs in it decisively. But the Kingdom must be present in the world, present as the Church, as the community of the righteous who live the life of the Kingdom and witness to this Kingdom.
They will not be able to turn the untransfigured world into an earthly paradise, but they are able to manifest an alternative to the existing order of things and to give the possibility of joining the life of the Kingdom to those who seek it. And this is the main task of the Church, as both Jesus Himself and all the apostles, including Paul of course, understand it. He speaks of his sufferings and those of his fellow servants not in order to boast before someone or frighten anyone.
He simply appears to want to dispel the illusion, already beginning to spread then among some Christians, that the Church can someday and somehow become a natural and organic part of this world, find its place in it, and even transform it, turning it if not into paradise, then at least into something more worthy than it had been since the fall. And the apostle does not tire of reminding everyone that such hopes are illusory. And illusions are not harmless, because they distract those carried away by them from the main thing: the Kingdom.