It's hard to consider an 81 on OpenCritic to be a trainwreck. People tend to buy games that review well, especially when it's a co-op shooter with basically no competition.

I honestly don't know what this "trainwreck" talk is. BL3 was passable. I didn't like the antagonists, but the game played fine if purples dropped way too much and the new guns weren't great. People make it seem like it was the Worst Game Ever and I don't get it. The pre-sequel was hot garbage, but 3 was fine.

From what I hear from people actually able to play the game, it's better than 3.

Something like:

2 > 4 > 1 > 3 > Pre-Sequel