Like Jesus, I hope, I try to 'do' Christianity - not talk about it.
If you reduce Jesus to nothing but a moral teacher, reducing his life and ministry to a mere philosophy about how we deal with others, then everything written would be meaningless, and so would any effort to have a personal relationship with him.
Knowing that miracles still happen today and that god speaks to us through the holy spirit, I know that Jesus was not merely a philosopher teaching otherwise secular princibles about human behavior.
There are other equally divinely inspired texts which serve to connect with that 'deep tapestry' which you mention.
Name them.
Now you are confusing two separate issues. I have made no pronouncement that Jesus is not the Messiah.
You either believe he was the jewish messiah or you don't. Which is it?
If you are undecided then you really need to do more research on the deep connections between the OT and NT.
I was once in your position. The situation is resolved by diving deeper into study. What is easy to dismiss at first glance as a handful of superficial connections will eventually be shown to be a deep tapestry where the OT and NT weave together - Something you can only get if you really dive into an understanding of the hebraic culture and theology, the environment the NT was written in.
What I have questioned is the enthusiasm displayed in backtracking such concepts into every nook and cranny of the OT and claiming 'I've found it'!
The OT is a shadow of the NT to come.
And the NT is the revelation of what was hidden in the OT.
Once you understand this princible and do some deeper research you'll understand why the OT truly does have the messiah woven all throughout it's fabric.
You cannot understand one without the other.
The NT was not written in isolation, with scholars later making slapdash connections. The apostles and Jesus himself make deep symbolic connections with the OT to demonstrate that fact that the OT was a picture of christ to come.
So deep is the connection between the two, that when you really research it you cannot reasonably conclude that a few men sat around and decided to weave together this tale from whole cloth.