They have completely ruined the raid pool. Ive been watching my local area so that I can get in some Giratina raids, but beceuse of how Niantic thinks it’s a smart idea to boost 5 star shadow raids on the weekend, it becomes even more difficult to see these raids appear.
I think a good solution would be to just have shadow raids outside of parks, malls and community centers. Let them appear at other gyms instead. This probably wouldn’t help the spamming, but at least they won’t take over the entire map.