Some of the most embarrassingly bad abilities to press in any arpg game I have played

Completely agree.

There is no excuse for releasing the game with this many bad abilities. And the player has no way to modify most of the abilities in the game in a meaningful or exciting way.

increase % modifiers on the paragon board(mostly stacking crit and vunerability damage).

The legendary aspects are supposed to fill the roll of modifying abilities but there aren’t enough of them and most of them again are just % increase damage done by.