I was going to write similar to this blasting Martinez, but I'm actually going to do so after a notable win, so that it's not accused of kneejerking.
As a short reply, no, I don't think we're better off now than when Martinez joined. The league has seen money flow into it which has resulted in off the field investment, and we now have a billionaire owner. On the pitch, where Martinez has influence, we've regressed badly, and his signings have been good, but on that note so were David Moyes', who left us in a strong position relative to the net spend he had available.
Because we're led by a manager who has no knowledge of how to balance a team, we will never progress effectively, and even if we have little spurts of results, there's always going to be a massive "if" over the consistency required to compete properly under his philosophy. The pumping in of investment will obviously help him move up the league table a bit, but ultimately there's dozens of other managers who will be able to do a better job with what is coming than he ever could.