It doesnt mean that bitcoin is not volatile.
Maybe they are frustrated because all the bitcoins that they received are instantly converted to fiat amount (bitpay works by that way, they convert everything to fiat and then they send it to their wire account)
Bitcoin had a plenty of 20-30% drops and spikes this year and the year before, it's simply not true that volaility has increased, unless they measure volatility in flat amounts, which is dumb.
And yes, it is a shit, i dont know why a lot of services are using bitpay as intermediary, it is always converting btc to fiat and that is the only way that they could lose.
I've personally used Bitcoin 2 times with Steam, and to those who don't know how it works, they actually have Bitpay as intermediary
Probably if they kept those bitcoins, they could have much more money. But the fees are ridiculous high for the customers.