Yes, I realize that different cultures created different deities and that each claims to be the "true one". I do think it takes certain amount of maturity and honesty to realize and admit that this is something man-made, and not made in heaven.
There is plenty of objective truth concerning the reliability of the Bible
Only on faith, and that's not objective, but subjective.
ignoring or minimizing it is hardly honest to me or mature.
It's not minimizing anything, but recognizing that man created his own religions.
Not sure what you mean by "this" being man-made, but I will absolutely agree that ALL religions ARE man-made. The very word means to bind back, man's attempt to bind himself back. However, there is a creator, a first cause, and being that we are "intelligent" ourselves, we can conclude that this "creator" also is intelligent, none of the complexity we see around us came out of chaos, but was designed. I won't go into all the stuff I know you have probably already heard, but suffice it to say, greater minds than ours have delved into the great beyond and come back with a surety. This surety is that this intelligent creator did not just create and then vanish to other universes but created with purpose and created us with purpose and an intellect to seek out answers to why and who and what.
There is objective truth in the midst of subjective, but wisdom allows one to see it clearly. There is a God-way and it's NOT man-made. I sure hope you haven't decided you have reached the epitome of intellect and stop looking for the truth, because it IS there, waiting for you. Real honesty also includes the ability to recognize a wrong path may have been taken and that the road to true honesty was where you were already traveling. Don't rule it out. I wish you Godspeed.