A 'bad rich person' is often someone who supports the opposition party or once tweeted something disagreeable. It doesn't matter if they employ thousands of people and generously give to charity.
And any individual "employing thousands of people" is really "exploiting thousands of people" unless the thousands of employees' wealth is increasing at a faster rate than the employer's.
We still have plenty of robber barons who are doing borderline human trafficking but I don't think these are even that bad. They're exploiting some helpless guy in Bangladesh, but in the end, that guy is better off.
The truly bad ones imo are the "silver or lead" ones - you do things their way and you become rich, you go against them and you're literally dead.