It's mainly that it's greatly exacerbated by many of the issues present in BG3's design and coding - the spell timing problem for when saves occur, the slightly overblown stats of creatures, the rampant unavoidable chip damage and automatic concentration breakers, the reduction in power or utility of many non-damage spells, the extra ease with which creature control effects and field control effects are broken or displaced, Larian's consistent buffing of attack roll bonuses and chances to hit without similar treatment to saves; all of these things exacerbate the divide, rather than redressing it.
