I expect Alabama to be ranked 13th in the CFP. If you are, all you need is for Texas to beat aTm to preserve that spot, and one team in front of you to lose. Clemson, SMU and Miami - need one to drop back. That will happen. So just beat Auburn decisively and you are in.
As for not deserving - there will be at least 5 teams in the playoffs who you would destroy. If they deserve to be in it, so does Alabama.
For every LANK kid on the team there are 10 others who are working hard and deserve our support.