Its not his job to place the kickoffs past the endzone. Most Special Team coaches want their kicker to place it high and deep enough to force the return man to make a decision, and allow the kicking team to tackle them behind the 20 yard line/force a turnover/have the receiving team flagged for a penalty. It is not the rookie's fault that most of the other 10 guys are terrible, and have been all year.
Catanzaro's kicks have been true. If he was pulling or slicing the ball, there is a problem with mechanics. His misses have been due to his body angle at the set-up and/or during the run-up. Like a 16-year-old driving on snow and ice for the first time, kickers will either over-correct or go catatonic (making no adjustments). This happens to all first time drivers, in bad conditions, and EVERY rookie kicker during the season. Catanzaro going through this, and gaining the inevitable learning experience during a stretch of games where the rookie's contribution may not have made a dramatic difference in the outcome, is a good thing.
When he starts to badly hook or shank the ball, then worry. For now, the only dramatic change needed is the expectation of perfection from fans. Every rookie has a learning curve, including kickers.