It's between Terminator Gynysys and Suicide Squad for me. Both flaming trash heaps that I'm just thankful that I didn't pay to see. And to be fair, I didn't watch any of the notoriously awful movies like Gods of Egypt or whuthavyuh. I did, however, see Warcraft and thought it was actually kind of fun. At least until the last 10 minutes of the movie that needlessly set up a sequel that's never going to get made. And Fan4stic was bad, but I thought there was actually something redeemable there under all that mess. Completely fell off the rails after the first act, but that first act was like a somewhat interesting pilot of a TV show that you'd at least watch the 2nd episode of before deciding to drop it.
Poor Jai Courtney. Dude seems nice enough and puts in work, but just isn't a very good actor. He was actually one of the better parts of Suicide Squad though, go figure.
Also, I'd say $50m isn't a particularly big budget these days. You have January dumping ground movies hitting that. Even $100m barely qualifies as "blockbuster," since plenty of genre films hit that too. I don't think you're starting to approach blockbuster territory until you hit about $150m budget. Blockbusters are huge tentpole films that are meant to prop up and finance a studio's smaller films. That's why it's called a tentpole. It makes a tent in which the studio fits all of their other, smaller films under.