My investments are down ~$30k (~20%). My net worth is down ~10%. I'm shocked how well the average person on here takes this considering how carefully we squirrel away funds. Seeing two years' worth of expenses vaporize in a matter of days is very frustrating and I have a hard time believing people are so willing to accept it. I can wrap my head around "ok NOW the assets are on 'sale'" so continue buying, but if that's the analogy then I was overpaying for the last 3 YEARS.
Unfortunately.. Yes. The market was asking you to pay $28 per $1 of profit, and you willingly did so. Don't beat yourself up about it, it's a part of the passive strategy and it just means that it will take longer for the buys at those prices to become profitable at a more sensible valuation, but if you stick to the strategy you will also hoover up your share when it is underpriced, so its swings and roundabouts.
As for people here being so sanguine about their losses, I can only speak for myself, but having been around for 2 major market meltdowns in my lifetime you learn that markets always over-react to a crisis, and these should be used as buying opportunities. If you're feeling bad about it then so is everyone else, and that is usually not a bad time to be buying. I run a more defensive portfolio than many here, because I envision that the bulk of my stash will come from earnings contributed over the next few years when I finally hit my FI number, not from compounded returns, so why take on huge downside risk for only a couple of %age points more expected return.
There is a time to be more aggressive and a time to be more defensive, and now with the markets having had a good haircut and future expected earnings correspondingly raised, now is the time to dial up the risk a bit.