You have the IQ of a crayon.
The difference in the outgoing radiation budget at the TOA boundary between a super El Niño year and a strong La Niña year can exceed 20W/m^2. The radiative forcing per doubling CO^2 is ~ 3.7W/m^2. So as a matter of fact, the change in net flux between ENSO extremes vastly exceeds all GHG forcing since the Industrial Revolution.
Difference is it’s short term and balances out year to year, diluted in totality by the thermal inertia of the ocean/atmosphere system, while GHG forcing accumulates over time (all else being equal). But of course ENSO is only one element of internal variability that is consequential to the systemic heat budget.