I think I was the only Norwegian sceptical of United appointing Solskjær back in des 2018. My feeling all the time has been that he got the job for football-romantic reasons (him being the new Ferguson and being a nice guy who knows the club etc.). He's done a lot better than I thought he would though, I have to give him that.
About your questions on Moe/Skullerud and all the goals conceded at Molde:
Moe and Skullerud didn't have large manager backgrounds either, but Moe was Ole's assistant at both his times at the club actually (2010-14 + 2015-18), so I'm guessing he has learned a thing or two from Ole. Moe is doing well with Molde at the moment, having an intense fight with Bodø/Glimt in the title race).
Skullerud previous job before the Molde time was as coach for Norway U-21. He won the league and the national cup with Molde in his first season(2014), but got sacked the year later (aug 2015) after some bad results. (Even though Solskjærs results in 2016 was worse than Moe's in 2015, this article is stating that:
https://www.vg.no/sport/fotball/i/328kv/skullerud-om-molde-avskjeden-en-helt-haaploes-beslutning). It both shows that Solskjærs results (start of season - august) in 2016 was worse than Skullerud in the same timeperiod in 2015, and Skullerud implying that Solskjær maybe was keeping his job due to his standing in Molde.
It's not normal for big teams (league winners in Norway) to concede a lot of goals:
(The stats below are from Ole's three whole seasons at his second period: 2016-2018)
2016: Rosenborg (league winners) conceded 25 goals, Molde conceded 42
2017: Rosenborg (league winners) conceded 20 goals, Molde conceded 35
2018: Rosenborg (league winners) conceded 24 goals, Molde conceded 36
Ole didn't win a single trophy at his second time at Molde, even though as I said in my previous post that he had one of the best squads and Norwegian millionare Kjell Inge Røkke providing the team with a lot of money. Molde's homeground is called "Røkkeløkka" meaning "Røkkeground" by the locals there, showing how important the millionare has been for the club over the years.