I almost forgot about these guys...
So, admittedly there are a handful of zoos that perhaps do deserve some grief for their elephant exhibits and management. Pittsburgh has certainly had a rather messy history with elephant in recent years and losing their accreditation from the AZA because of it wasn't a great look. I haven't been there in person so I can't fully judge the exhibit, but it doesn't look awful from what I've seen even if the barn leaves a lot to be desired.
Bronx has been put in a difficult place purely over circumstances they cannot control. Oregon had a tragic incident that again was out of the zoos control. Louisville's exhibit may be rather underwhelming, but I can at least admire their success with the recent birth. Miami was a big surprise, as I have always noticed they have been perhaps the one major zoo with elephants that has avoided this list. San Diego was also surprise, but it seems like their issues didn't lie in the exhibit itself, rather the management of the elephant owned by the SDZ Global - you know, doing actual conservation work. Don't know enough about Hogle or Edmonton Valley, though I will say I am shocked Lucy at Edmonton is still alive.
Out of all of them, Rosamond Gifford was easily the most ridiculous. Their main argument was that a male elephant calf was sent elsewhere in 2014 at the "tender age of six." A quick google search disproves this entirely. Additionally, Doc - the zoos bull - is apparently being sent to another zoo soon and is being "separated from his family." If the IDA are such elephant experts (or pachyderm pros

) they should now that male elephant will leave the herd and won't stick to the same family group their whole lives. So this argument is basically a whole lot of nothing.
All these lists over the years prove is how uneducated these people are about what they're talking about. They have described normal elephant behaviors as negative traits that indicate they are "suffering" numerous times, have done absolutely nothing to support wild elephant conservation and when zoos do just that they have a problem with it - just look at the 2016 Dallas, Omaha, Sedgwick County (Three of the best elephant exhibits in the country may I add) Import from Swaziland. Those animals were going to be killed, but those zoos stepped in. The constant use of anthropomorphism such as comparing artificial insemination to rape and assuming an elephant touching a fence means its trying to escape delegitimize much of what these people are saying, and in the long run this list isn't going to do much of anything. I can least give the benefit of the doubt that all the listed zoos are doing actual work for elephant conservation.
(except the natural bridge zoo, that place looks like a hellhole...)