Reversion to the mean always bites after a hot streak.
Results are more likely an artifact of a streaky RNG than anything nefarious. Similar experience around two months ago. Only rusty chests after a point. Implemented Musashi's advice on fixation and temporarily moved on to something more productive. Luck seems to positively affect gear intensity, unconvinced it affects much else.
Is the character human, elf, or gargoyle?