While I have my share of complains about Larian's implementation of some mechanics, I really don't feel like there are substantial arguments being used here.
Even putting blatant inaccuracies aside (you CAN avoid some of these encounters and/or make them easier for you in several ways) I also happen to disagree on several of your grievances.
Also, encounter design was arguably one of the strongest points for DOS 1 and 2 and not one of its flaws (that would be the shitty randomized itemization and the exceedingly steep power curve on level ups).