I think yes, this is pretty disappointing to most of the crypto community overall.
In 2018, and late 2017, there were billions of dollars worth of crypto stolen from major exchanges, that mostly covered the losses out of operating profits. Some may have been operating with fractional reserves, it is hard to know for sure. In comparison, this hack is nothing.
Many exchange operators do not have sufficient risk management experience to keep themselves safe from theft. High profit margins and trading volumes have previously kept exchanges solvent after hacks. A good rule of thumb for exchanges is to keep no more than one month's profit worth of crypto in hot wallets, so the exchange could "earn" their way out of a hack within a month, but I cannot imagine Bithumb making more than $30 million/month in the current downturn. Bithumb is also most probability faking most of their volume, but that is another story....