どころか

1. 1Far from X, the reality is unexpectedly the opposite.Ex. 1
2. 2Let alone X, even a more basic Y was not possible.Ex. 2

Used in speech and writing to correct an expectation, often with a surprising or frustrating result. In the “let alone” use, the following clause shows that even something more basic was out of reach.

• はおろかN1「はおろか」 covers only the 'let alone A, not even B' meaning, usually with a negative second clause and a stiff, formal tone, and verbs need 「の」 before it (「歩くのはおろか」). In that meaning it is interchangeable with 「どころか」.
• はもちろんN3「はもちろん」 first affirms A as a given, then adds B of the same kind; it attaches only to nouns (including noun + case particle) and has no 'on the contrary' meaning. It can replace 「どころか」 in its escalating sense but lacks the strong tone of rejecting the first part.
• どころではないN2「どころではない」 can end a sentence on its own, meaning circumstances leave no room for something or that the first statement falls far short, whereas 「どころか」 cannot end a sentence and must be followed by a clause presenting an opposite or even greater fact. The two are not directly interchangeable.
• に反してN2「に反して」 usually follows nouns such as 「予想」 or 「規則」 and is fairly formal, indicating a result contrary to expectations or wishes, or a breach of rules or norms. 「どころか」 instead introduces 'on the contrary, B,' 'not even B,' or 'even B,' so the two are generally not interchangeable.
• わりにN3「わりに」 accepts the first part as true and only says the result doesn't match what it would lead you to expect, whereas 「どころか」 uses the first part as a setup for an opposite or more extreme fact. 「わりに」 needs 「の」 after nouns, and the two are not interchangeable.

はおろか shares the “let alone” use but is more formal; はもちろん adds what is expected rather than correcting an expectation. どころではない means “in no position to do X,” に反して means “contrary to X,” and わりに marks a mismatch relative to what X would suggest.