I ranted about it at one point, probably in this thread, but a quick recap because I'm not at all surprised by what I'm hearing. I purchased 28 days later on DVD from a blockbuster back in the day. I liked the movie so much I watched it with director commentary turned on, something I've only done a few times in my life. The two directors commenting made it abundantly clear that it was just dumb luck, and a series of random setbacks which caused changes to the script that we even got the movie as is. No joke, they had filmed half the movie when one of the people on crew made some comments about how it didn't make any sense, and they realized he was totally right and had to stop production while they stayed awake for like 48 hours straight trying to rewrite something better. The whole second half of the movie was basically a last minute hail Mary to salvage their dumb vision. If it wasn't for that the movie would have been absolute trash. They literally paused the movie in the director commentary and go through and show you a bunch of artist renderings for how the movie was supposed to happen, and they both agree that it was really really dumb and they don't know why they ever thought that was a good idea. So yeah, at the end of that I thought "holy fuck, probably should steer clear of anything else these guys do!"
Sounds like that was the right call.