Generally players drafted in the first AND second rounds are expected to become starters. It has been documented by me and others that the Broncos have been bad at finding starters in the second round of the draft. This is exacerbated by the fact that from 2000-2017 the Broncos had the most second round picks in the entire league with 24 (almost double the 13 of Houston and Washington). The Broncos took a lot of swings and had a lot of misses.
Now the general consensus is that you can’t truly evaluate a draft until the drafted players have been in the league for three years.