They had a chance to prove that they should have been in. Georgia manned up and seized the chance for redemption. In marked contrast, Florida State pouted and sulked, and the result was a 63-3 beatdown and the subsequent sinking of the FSU program. Apparently some people are still pouting and sulking.
How they reacted to not being included in the playoff has zero to do with why they were left out or whether or not they should have been left out.