As an early investor, I can understand pinionless and i'm irritated too. It's even worse if you invested with FIAT...
Nowadays FIAT is still more reliable than crypto and therefore helps the whole project (more planning reliability/stability due to less volatility). But the counter draw is, FIAT investors get treated in a way, which makes their investment worth less than an investment with crypto over the last weeks. If it would just have been some per cent, i think almost nobody would complain...but up to about 60 per cent is a punch in the face of every early FIAT investor

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It would be a fair and reasonable reaction of the miner one team, to acknowledge this fact and balance it in an appropiate way within a goodwill action

Just a suggestion:
What about refunding these people, deleting all MIOs of their accounts, and then they can decide to invest again for the conditions of today?
Can you forward this thoughts to the founders? I think there are a lot of early investors, who don't feel very happy about the fact, they subsidize investors which joined the community afterwards in such a remarkable way and to their own disadvantage.