Let's assume Jesus existed and was indeed who it’s been said He was: -
What was the plan?
1. To have him sort out the corruption in the temple and amongst the general populace?
2. To hold the people in check by renewing their faith in God? By doing miraculous stuff.
3. To convert the world to the Jewish faith?
4. To kick out the Romans for the desecration of His Temple?
5. To create a new world religion/faith in God?
----------------------------------------------
Case 1: To have him sort out the corruption in the temple and amongst the general populace?
For a short while, it appears he succeeded with this. Although, it was short-lived, ending a few days later with His death. Presumably, following that, things returned to normal.
It must be said that if this was the goal, it was a pretty low-key operation. Given all the years in the planning and three years plus of actual action which culminated in a complete and utter failure. Nothing like the scale of His usual methods for instant "correction".
I.E. The Great Flood, Sodom and Gomorrah, etc.
Case 2: To hold the people in check by renewing their faith in God? By doing miraculous stuff.
This was a more successful while it lasted. However, it seems rather than renewing the people’s faith, it antagonised them. So much so that in the end they called for His death in preference to a known felon. Plus, rather than perform miracles that would make everyone sit up and take notice, He kept them low key. Now, had Jesus done the big things, say draining the dead sea or raining fire on a city or two, I suspect there would be few who would gainsay His powers. Moses had no problem throwing his weight about with plagues and famine and those certainly had the desired effect.
Case 3: To convert the world to the Jewish faith?
Well, this just hasn’t happened. In fact, there are other religions with more followers. Again, had He gone about it with more pazazz, He could have had the world at his feet, as the devil* pointed out. As it was, the Jewish faith ignored the event, deeming it not even worthy of a mention in their records.
*It seems odd that the temptations were part of the plan. The plan had been set out years before His birth.
Case 4: To kick out the Romans for the desecration of His Temple?
This couldn’t have been the plan. Even He acknowledged the Romans' right to be there and denied any inclination in that direction. Plus, it had no effect on the Romans what-so-ever as they carried on controlling and crucifying for many years after.
Case 5. To create a new world religion/faith in God?
This seems unlikely. Had this been the plan, then surely Jerusalem, a small town on the edge of nowhere, wasn’t the place to start. Rome would have been the locale for any such attempt as showed years later by the ones that did it.