No way. He had his chance and we’ve moved on. Would have been interesting seeing what he could have done with the budget Koeman has been afford given he trusted young players and liked attacking football but he’s in our past now.
There's literally nothing to suggest Martinez would've made good use of the money. The vast majority of his signings were abysmal.
And even if he had bought well, as is currently all too clear, there's a lot more to management than recruiting new players. For example, Martinez couldn't organise a defence to save his life. He took one of the strongest defences in European club football, and turned it into a laughing stock. Better players wouldn't have solved anything in that department.