Well, since 2015 the Bengals are 0 for 4 drafting 1st and 2nd round linemen. Last lineman they drafted that is what you would call good is Zeitler. Before that it was Whitworth. It's a really long dry spell. They've gone 0-fer on every other round as well in that time period. Look for yourself. That's some really crappy luck, or they are doing something wrong.
https://www.pro-football-reference.com/teams/cin/draft.htm