It flies under the radar a lot, but Rustam Khabilov vs. Adriano Martins was incredibly bad. I think four strikes were thrown in the fight. It stands out to me because at the time, both guys were fringe top 10-15, and they had put on exciting fights in the past. Instead, they just circled and shadow-boxed each other.
I thought Cain vs JDS was boring and bizaare in a cringey way. I think by the end of the 2nd round, it was clear that JDS was out-matched, and we had to watch 15+ minutes of Cain pushing him in the fence and mauling him there.