Gonna throw a different POV here.
There's nothing called kaliyuga. It's just a concept created knowing the average human's fickle mind and their intentions be it greed or lust, to keep humans living with morals. To be good and do good.
Karma is nothing but what goes around comes around. Or in the end, everything evens out! You win some, you lose some.
No matter what good you do, you can still live an unhappy or dissatisfied life. That unhappiness isn't because of the good you did, but your greed for something beyond your reach or something that's not meant for you.
The one who is smart, meets the right people and develops connections, grabs the opportunity wins things in life. And it's certain that our entire life happens because of mere coincidences!
You can live a life being the most honest, innocent and good-est ever person on Earth and still die a pathetic death with nobody around to save you. It's not karma. But just coincidence!
Think of all the good things and bad things that ever happened to you because of coincidences. You will see things in a whole new dimension.