There is still a problem here that you don't seem to be able to acknowledge. I will try to break it down further.
1) You say the Earth "looks" about 6000 years old.
2) You say we can not trust geological uniformitarianism essentially because "we have know way of knowing..."
3) If we do not know that geological processes operated similarly today as 4 billion years ago, then it follows from (2) that we do not know how they would have operated differently.
4) The Earth age of 4.6 billion years is arrived at by mathematically modeling said processes under the framework of uniformitarianism.
5) The Earth age of 6000 years is arrived at...?
If you deny uniformitarianism then without a replacement framework, anything goes. You have no way to deduce a 6000-year-old Earth by observation, inference, extrapolation, or anything other than an absurd formula cooked up by a self-important clergyman, using 3000-year-old Hebrew legends.
I really hope you follow me this time. I am getting tired of watching you engage in doublespeak.
A global flood and anti-uniformitarianism will not help you explain the meanders in the Grand Canyon.