Generally speaking (not saying the original poster is one, to be clear), when posters here complain that a player is "terrible" they do it because they expected too much from him. McGovern's draft profile, in an overall sense, was "Will Eventually Be Average Starter".
While it's disappointing that he's not gotten there, it's not like he should have been expected to be another Martin or Smith or even a Collins. And it's just as likely he won't eventually be a starter. His draft profile in specific areas showed a lot of shortcomings. Basically, his upside was that he was big and strong, and he had played center and guard in college. That's a long way from being an NFL starter.
I have expressed doubts about our new draftee Tyler Smith, (and been roundly criticized for it, which I get) while many are all atwitter about his "nastiness" and "power", which is great, but conveniently ignore his many technical faults, especially the extremely high penalty rate. For despite the NFL, and football in general, being full of very strong people ignores the fact that most everybody is very strong, Smith isn't going to overpower guys like Aaron Donald or Fletcher Cox, e.g. on a regular basis. He has to have the footwork, etc. to be a top starter in the league.
McGovern hasn't gotten to where he needs to be, but we can't count on every 3rd rounder to be just as we hoped for...