There is a bit too much loot, especially in shops (these druids and tieflings have multiple +1 weapons in their shops and don't use them for defending the grove!?!? What?!?!!).
The complains about shops admittedly feel a bit weird to me.
What's in a shop inventory is not equal to available loot. Even Kingmaker had a certain amount of +1 magic weapons immediately on sale by the very first merchant you meet... And yet chances are at that point of the game you could hardly afford any.
Did people forget that in BG2 some merchants(shops were already selling "end game" items the very first moment you crossed them, which was potentially minutes after leaving the Irenicus tutorial dungeon?
I'm fine with shops in Baldur's Gate having a bunch of generic +1 weapons and armor. But it just feels weird that I can find so many (like 10?) magic items being sold by the Grove vendors. One is a druid (he literally says he has "odd bits and ends" for sale) and the other is a refugee (who somehow has a bunch of magic weapons). I feel that it doesn't make sense and cheapens the specialness of magic items.
I don't remember the beginning of P:Km. If a similar amount of +1 weapons were available and that merchant had a similar status (i.e., refugee), then I probably would argue against that too. But also, magic items are much more prevalent in Pathfinder than 5e.
I didn't play BG2 so I can't really comment.
