They should be better regulated, but companies have been big for centuries, few come close to the power held by companies in various colonies.
any petty despot enjoys the same level of power
The companies in question had a massive technological and force advantage over the local populace with free reign when it came to managing dissent with force. Their only political concerns were back in Europe.
Some argue that some live in borderline corporatocracies now, but the 17th century was a completely different ball game.