The sets themselves are applying, but the bonuses are not. If they were, they’d be a greenish-teal color instead of grey. See the affix “Patience” in the third image here.
For bonuses that say you must have X of the set equipped, that means you need that many items with the set on them. That’s not the same as having the number in parentheses be big enough. In your case, all four of your bonuses require 4 of the set. You only have 1 druidic, 1 aftermath, and 2 plagued.
Thats what @CuzegSpiked was trying to tell you!