I don't know if you're aware of this, but seasons 1 and 2 are both adapted from the same manga, with nothing so much as a week's difference between the last chapter season 1 was adapted from, and the first one season 2 was adapted from. So if it's inconsistency you're noticing, it's self-fulfilled.
I don't know if you're aware of this, but season 2 is directed by a completely different person than season 1 and OVAs.
I did not know it either, but after I realized that something is totally amiss, I went and looked up. I was not making any conclusions at that point, but now, at the end of the season, I can with all certainty say that it pretty much explains why the show is just going downhill so badly despite being based on the same material.
If both parts had been labled as the same show as would be in long-running shounen like one piece or naruto, flowing seamlessly into one another, the show would have continued directly from where it left off and you wouldn't be able to even make such a comparison.
Funnily, I've watched slime for the first time only last September, and watched it again just days before the new season started.
So for me it was supposed to "flow seamlessly", it's what I wanted and hoped for, but it never happened, instead it felt wrong from the very first episode.
Surprisingly (?), this never happens with other multi-season shows which
keep their key staff. Those shows may vary slightly in pace, action and general entertainment, but they do have that seamless flow and same feeling from season to season - to name a couple, Overlord or Konosuba.
If I am being serious, then maybe I'm just not integrated into the same groupthink as the rest of the people on this thread who didn't notice that from season to season, the events followed a reasonable flow of tone and structure
So yeah most likely it's not the "groupthink", rather just you not noticing subtle changes that others do see.
For me in all my arrogance and vanity that may be, those changes separate art from craft.
But well.. if you still can enjoy and love the show, then.. good for you, I suppose. No disappointment and regrets, just fun.
Peace.