BFMV is pretty much the definition of uneven in my eyes. I still think their debut album, The Poison, is a 10/10 metalcore album. Sure, I've got massive amounts of nostalgia for it, but it's filled with fantastic riffs and great songs nonetheless.
Waited three years for Scream Aim Fire. Was incredibly hyped and thought it would be amazing, but it disappointed me greatly. Their third album was better, but not as good as the first. Then we got Temper Temper, which was straight up bad. So far we're going up and down, with a clear downward trend.
Next we got Venom, which was a return to form. Still not as great as The Poison, but better than any of their other albums. If they stayed with this as a template they could've made some amazing albums. Unfortunately they chose to forsake all of their good qualities to emphasize their weaknesses. They massively cut back on riffs and solos, while focusing on vocals and synths.
They really had potential, but somehow keep making bad decisions. Such a waste.