The original Crowdcube round was valued at £30m (ish) from memory - £33m to £4.5bn is a pretty good return in my books, even accounting for dilution. £4.5bn is also conservative and I’d expect it to be much higher than this
Based on a number of disgruntled Crowdcube investor comments, (not those who require the money for genuine reasons - health, financial difficulty etc.) I’d say a number of investors made their investments without truly reading and understanding the terms and risks. Only themselves to blame if they’re unhappy