He's honestly doing roughly the same with better players and more money. He also faces a much tougher B1G conference schedule (especially next year). Ohio State has separated itself from everyone else in the B1G and that wasn't the case when Joe was coaching. They were very good, but now they're elite.
Top to bottom, the Big Ten was immensely more competitive from the early 90s to the mid 2010s. And the last couple years? The Big 10 from #4-#14 is a clown show.
Through the 90's, with PSU in the conference, the Big Ten averaged 4.5 ranked teams per year - out of 11 total.
Now? Not so much - even with 14 teams.
And Penn State, specifically, still played some reasonable OOC games until recent years (PSU played 9 ranked teams OOC in their first 10 years in the Big Ten - regular season, not counting bowls).
Since 2011 (when they played Alabama) PSU has played .... ONE.
ONE ranked team OOC in 12 years - and that was Auburn in 2021 - who ended up being far less than ranked as the season played out. And the vast majority of those games were not just "unranked", they were beyond cupcake level.
In recent years, PSU has basically played a 2 game schedule, against 2 teams they don't beat.
It is what it is.
And also without the additional game (the 12th game) during those earlier years against another cupcake (ie, 9 win season then = 10 win season now)