Happy to interact with you.
What makes your position unusual is the literal interpretation of tribulation passages, but the allegorical interpretation of the millennial reign of Christ. Perhaps we should explore why you believe the Davidic Covenant will not be ratified by the Lord as King, in spite of the many passages that prophesy that. If there is no millennial reign of Christ, is the Davidic Covenant dead and gone?
Do you have a source for saying that to the Hebrews 1000 is "a number too large to count"? This seems false, since many, many times in the OT there were numbers given far above 1000.
The disciples and other Jews based their belief in a Messiah on the Davidic passages, of which there are many. Here are just a couple: 1 Kings 2:45, 9:5, Luke 1:32, Acts 1:6-7, and many others.