Based on the current trend toward intensive preparation compared to a few decades ago, SAT/ACT and other standardized tests are far more costly in terms of time and effort compared to a few decades ago. Even the low end amount of SAT/ACT preparation today referred to in What is the typical amount of SAT or ACT preparation these days? is far greater than the amount of SAT/ACT preparation a few decades ago.
So perhaps the dislike of being tested today may have to do with the large time cost that is expected today.
The tendency of intensive preparation may also be something that colleges think about when deciding test required/optional/blind policies – from the college’s point of view, does intensive preparation increase or decrease the value of SAT/ACT scores in terms of what they are looking for?