Stop spending so much money developing features that are useless for adding value to the site; stop hiring devs to create new 'resume' features like counter-productive reverse-blocking and hire devs to fix modding tools. Stop spending money hosting videos and multimedia when your core value is text conversations. Don't make stupid decisions like destroying your most popular features (the AMA subreddit, the secret santa) because you are stupid. Fire your CEO who is doing all of these things.
There is no reason reddit can't be profitable if they did these things. They don't need 100,000,000 users watching videos to bring in ad revenue. They need 10,000,000 users generating good content that ends up as top google results and they can find clever ways to monetize product tie-ins, annual meetups (those were a thing in a lot of cities a while ago), events, merch, and subscriptions. It isn't rocket science. The top stockholders just have to be satisfied to be millionaires instead of billionaires.