Exactly no one would be happy about a decline in their efforts when they must have put up so much to make it work, tho every investors should understand that there are times the market will be favourable and there are times it would be tormenting, so at every stage they shouldn't panic or be in pressure of wanting to sell out, but alot of investors don't actually have such patience of waiting so they go on with selling. Patience it's actually a vital key when involved in things that are associated with money and if you think it doesn't worth the wait then don't go into it.
You buy, you hodl, you expect profit to be made from your investment, profit comes, you consider it not to be enough, you continue holding, market correction comes and you start panicking and wanting to sell because of market correction.
That should be considered to be a reaction of a short-term investor who is looking for much profit but yet not ready to wait for how long it's required to get there and is also greedy enough that they don't want the market to correct when necessary to offer others a good buying chance too.