42 now, it's difficult to draw conclusions given the number juniors I've seen makes it more "anecdote" than "survey", but what I have seen is that juniors used to and still do usually miss half the picture*, but which half was never consistent: one example on the small-scale was in Swift, where optionals kept being declared with ! rather than ? because they didn't understand the difference; one on the big scale was having thousands of lines of code lying around commented out for lack of a better way to think about what they were doing. Looking at my own archived code from when I was a junior as well as all the others I can remember, the only commonality was insufficient (or absent) automated testing.
But have juniors gotten worse? I'd say no. Possibly because the languages themselves have gotten easier to work with, possibly because more and better checks have become automated by the compiler (e.g. on iOS, it now alerts you to not do do UI anywhere but the main thread, whereas 20-30 years ago in C you'd be lucky to get the correct warning about which line was missing a semicolon), and it is a small sample size, but I would say the code juniors produce today is (slightly) better than it used to be.
But even 20 years back, a decent junior given a goal and freedom abut how to reach it, could make some very nice end-results.
* Seniors don't get it all right either, it's more like missing a quarter, then an eighth, etc.