Alright, so we pump energy into a chaotic system and obviously the extremes will get more exteme. Stronger hurricanse, colder hurricanse and snap freezes, deeper floods, wet bulb events further north than you think possible, whatever. This is the known unknown.
I am existentially afraid of the unknown unknowns. At what point do the phytoplankton I'm currently breathing the poop of have a mass extinction event? All of human civilization is about to drown on dry land and I spend 5 days a week maintaining software that charges people for turning on their lights.
I crave death I crave oblivion death to america death to capitalism death to me.
Look worst case scenario we simply direct a massive asteroid into a collision course with mercury creating a ring of dust between the earth and the sun, I'm sure there are some minor details to be worked out but the theory is sound
Or, maybe stop Venusforming Earth before we try Terraforming Mars.