I’m sorry OP, but I think the burden on proof is really on you to explain why evolution somehow makes the doctrine of original sin “very problematic”.
In my experiences atheists always seem to just assert that evolution is somehow a defeater or is problematic for theism without any argument, kind of sneakily shifting the burden of proof onto the theist when it should be on the atheist. I imagine this happens so often without challenge because of the whole notion that the anti-science fundamentalism popular in the USA and exemplified in the movie “Inherit the Wind” is what real Christianity is. In fact, such fundamentalism is an aberrant American phenomenon in reaction to the so-called enlightenment and completely at odds with classical theism.
So here’s some data, perhaps those wishing to create some kind of irreconcilable chasm between biological evolution and original sin could explain how this argument goes through and shoulder their burden here?
[quote=Catechism of the Catholic Church]355 "God created man in his own image, in the image of God he created him, male and female he created them."218 Man occupies a unique place in creation: (I) he is “in the image of God”; (II) in his own nature he unites the spiritual and material worlds; (III) he is created “male and female”; (IV) God established him in his friendship.
I. “IN THE IMAGE OF GOD”
356 Of all visible creatures only man is “able to know and love his creator”.219 He is “the only creature on earth that God has willed for its own sake”,220 and he alone is called to share, by knowledge and love, in God’s own life. It was for this end that he was created, and this is the fundamental reason for his dignity:
What made you establish man in so great a dignity? Certainly the incalculable love by which you have looked on your creature in yourself! You are taken with love for her; for by love indeed you created her, by love you have given her a being capable of tasting your eternal Good.221
357 Being in the image of God the human individual possesses the dignity of a person, who is not just something, but someone. He is capable of self-knowledge, of self-possession and of freely giving himself and entering into communion with other persons. And he is called by grace to a covenant with his Creator, to offer him a response of faith and love that no other creature can give in his stead.
218 Gen 1:27.
219 GS 12 § 3.
220 GS 24 § 3.
221 St. Catherine of Siena, Dialogue 4,13 “On Divine Providence”: LH, Sunday, week 19, OR.
[quote=Catechism of the Catholic Church] 397 Man, tempted by the devil, let his trust in his Creator die in his heart and, abusing his freedom, disobeyed God’s command. This is what man’s first sin consisted of.278 All subsequent sin would be disobedience toward God and lack of trust in his goodness.
398 In that sin man preferred himself to God and by that very act scorned him. He chose himself over and against God, against the requirements of his creaturely status and therefore against his own good. Constituted in a state of holiness, man was destined to be fully “divinized” by God in glory. Seduced by the devil, he wanted to “be like God”, but “without God, before God, and not in accordance with God”.279
399 Scripture portrays the tragic consequences of this first disobedience. Adam and Eve immediately lose the grace of original holiness.280 They become afraid of the God of whom they have conceived a distorted image - that of a God jealous of his prerogatives.281
400 The harmony in which they had found themselves, thanks to original justice, is now destroyed: the control of the soul’s spiritual faculties over the body is shattered; the union of man and woman becomes subject to tensions, their relations henceforth marked by lust and domination.282 Harmony with creation is broken: visible creation has become alien and hostile to man.283 Because of man, creation is now subject “to its bondage to decay”.284 Finally, the consequence explicitly foretold for this disobedience will come true: man will “return to the ground”,285 for out of it he was taken. Death makes its entrance into human history.286
278 Cf. Gen 3:1-11; Rom 5:19.
279 St. Maximus the Confessor, Ambigua: PG 91,1156C; cf. Gen 3:5.
280 Cf. Rom 3:23.
281 Cf. Gen 3:5-10.
282 Cf. Gen 3:7-16.
283 Cf. Gen 3:17,19.
284 Rom 8:21.
285 Gen 3:19; cf. 2:17.
286 Cf. Rom 5:12.
[quote=Pope Ven. Pius XII]37. When, however, there is question of another conjectural opinion, namely polygenism, the children of the Church by no means enjoy such liberty. For the faithful cannot embrace that opinion which maintains that either after Adam there existed on this earth true men who did not take their origin through natural generation from him as from the first parent of all, or that Adam represents a certain number of first parents. Now it is in no way apparent how such an opinion can be reconciled with that which the sources of revealed truth and the documents of the Teaching Authority of the Church propose with regard to original sin, which proceeds from a sin actually committed by an individual Adam and which, through generation, is passed on to all and is in everyone as his own.
12. Cfr. Rom., V, 12-19; Conc. Trid., sess, V, can. 1-4.