I recently thought of a comparison for the dialogue in BL3.
I remember years ago being coerced into watching Spongebob by my now wife. I thought it was pretty dumb, but I had to admit that there were some legitimately hilarious moments. Fast forward a few years and Spongebob has new writers, and the show is completely unwatchable. This is how I feel about BL3 dialogue.
Also, I wanted to share an article I came across from Vice that sums up my feelings pretty well, and shows that at least 2 other people feel the same way I do.