My picture of Portugal is one of reality.
In the absence of DNA evidence, both investigations rely on goodwill. I cannot say what the situation is in the UK, because I don't track opinion aka goodwill there. In Portugal, there is a lack of goodwill, which will help neither investigation.
There is no allegory of good v evil.
There was a McCann PR unit set up to protect the parents.
It focused on the UK and ignored Portugal.
It did next to nothing for Madeleine.
Team McCann chose to ignore Portugal.
It appears your opinion is at variance with that of Pedro do Carmo who replied when asked why ten years after the event Madeleine's disappearance is still so much in the public eye ...
"First, there was a deliberate and legitimate effort on the part of the child's parents to keep the topic on the agenda of the media."
When asked if it had been a mistake to make Madeleine's parents arguidos in 2007, his emphatic response was ...
"I will not naturally answer that question.
But what I can say, like I did in 2011 and 2013, is that Maddie's parents are not suspects.
This statement remains: the parents are not suspicious. Ponto.
http://expresso.sapo.pt/sociedade/2017-05-03-Pedro-do-Carmo-Os-pais-de-Maddie-nao-sao-suspeitos.-Ponto-1#gs.sEWw0fUPedro do Carmo who is the deputy director of the Judiciary Police seems to have a very positive outlook as far as Kate and Gerry McCann are concerned ... so perhaps there isn't as much doom and gloom amongst Portuguese opinion as you seem to think.