Right, but isn't this good when we are talking about fossil fuel companies? Fair competition drives down the price of fossil energy, while our goal as a civilization should be to raise the price as much as we can stand (to infinity if possible!) so that we don't cook ourselves.
You can therefore make the argument (though I don't agree with it myself) that subsidies to big oil that reduce competition from upstarts is, in a twisted way, a climate-positive policy.
This of course fails because subsidizing big, publicly-traded oil companies reduces their cost of capital. This causes rational capital allocators to rationally invest in fossil fuel exploration, resulting in more carbon being dug out of the ground and added to the atmosphere.