There were multiple reasons why Ves brazenly put up so much resistance to participating in a design duel.
First, he genuinely lacked the confidence to win against an MTA elite like Jovy.
Aside from the MTA mech designer's excellent upbringing and access to some of the best resources in human hands, Ves simply knew too little about his opponent!
The same did not apply to Jovy. The man not only accessed Ves' record, but also spent days on the Little Angel!
Though the fabrication of the masterwork mech was mostly Gloriana's work, Ves had been a lot more involved in its design. A mech designer as competent as Jovy should have been able to figure out most of Ves' strengths and weaknesses with that much examination!