The only way to get a monopoly under capitalism is to use the govern-cement. And then you end up with crony-capitalism.
While real factory owners have to make a profit. (more incoming than outgoing) The factories who are sucking off the govern-cement teat do not. Like all the car companies in The US, including Tesla.
But, if it wasn't for govern-cement regulations keeping other car companies from ever forming, then these car companies would all go bankrupt as better car companies formed through innovation.
Further, all of the huge separation from the 0.01% and the 99.9% is the largest monopoly of them all. Banking. Currently the central banks skim 6% off of moneys every year. Yes, you pay 6% per year just to hold that dollar bill in your pocket.
Next, these central banks were on a fractional reserve lending. So they are inflating the money supply. This ends up with the little people paying a tax of about 12% per year on all dollars that they hold.
The people nearest the spigot of money creation get fantastically wealthy, because they pay 1%, while the rest of the people pay 12%. This arbitrage takes from all the little people and gives it to the fat cats.
And to reiterate, this only happens because of the govern-cement protecting the business by allowing a monopoly.
Unfortunately none of this is capitalism. So, you cannot lay it at the feet of capitalism.