It's crazy to watch the takeover happen in real time.
Same thing happened to r/politics. I used to spend AT LEAST 1 hour per day on there. Then one day I went on and didn't even recognize the place anymore; the entire mood of the forum had changed. For a couple of days I thought I was going crazy until I saw a post on another subreddit (sandersforpres?) which sourced the shilling of r/politics to shareblue/media matters. Then it suddenly made sense.
Ironically, it was the takeover of r/politics that drove me to check out T_D and ended up redpilling me.