Instead they wanted to be Facebook Jr, killed all of their interesting and niche aspects, ignored the things users and mods were asking for, and hamfisted general ads in people's faces while adding expensive, unneeded (unwanted!) features like live chat and video hosting.
Reddit is an example of what happens when you put people in charge of a business who are both greedy and stupid.
No, it's what happens when your investors are VCs who need to 10x on their wins because most of their investments fail. As a result, stable, long-term profitability isn't the goal; big IPOs are, or at least explosive growth. There's no room for a company which is moderately successful when VCs are involved.
I think this is just the way of the world. Usenet -> Slashdot -> Digg -> Reddit -> Discord -> ???
One can suggest that recent decisions were "blunders" due to the problems they have encountered, but maybe there just was no path forward for them simply because there's not much value to be extracted from this business. Now we just see the entire house of cards collapsing around them.