Hitting is not that hard in 5e. AC tends to be rather low. Many, many, many 5e games have almost no magical weapons, sometimes +1, often none. Not hard to hit at all. Players can gain Ability points (L4, L8) and gain Proficiency Bonus (L5, L9), while AC tend to be rather moderate.
I am NOT saying Larian implemented the rules well. No, I feel their design feels very improvised and it looks like a very early playtest in terms of stats / combat. But the argument about +2 swords in not really in line with the 5e tendencies. That varies based on the DMs, some of which might like the older D&D games where characters ended-up having their basic +3 kit (ring, weapon, cloak, etc.) and more.
BG3 will clearly have more magical weapons, at release, than many 5e games that often make them rather exceptionally rare (again, depends on DM).
