How is <PERSON> a 'bad wizard'?
In Harry Potter and the Goblet of Fire, <PERSON>, <PERSON> and <PERSON> run into <PERSON> and <PERSON> at the Hogwarts kitchens. When <PERSON> mentions <PERSON> is a judge for the Triwizard Tournament, <PERSON> (<PERSON>'s sacked house elf) says this:
“Mr. <PERSON> comes too?” squeaked <PERSON>, and to <PERSON>’s great surprise (and <PERSON>’s and <PERSON>’s too, by the looks on their faces), she looked angry again. “Mr. <PERSON> is a bad wizard! A very bad wizard! My master isn’t liking him, oh no, not at all!”
“<PERSON> — bad?” said <PERSON>.
“Oh yes,” <PERSON> said, nodding her head furiously. “My master is telling <PERSON> some things! But <PERSON> is not saying . . . <PERSON> — <PERSON> keeps her master’s secrets. . . .”
Harry Potter and the Goblet of Fire, Chapter 21: The House Elf Liberation Front
My question is,
Why is <PERSON> considered to be a 'very bad wizard'?
Yes, that is only the opinion of <PERSON>. Everyone else seems to like <PERSON> (except <PERSON>, of course). But even <PERSON> doesn't seem to think <PERSON> is a bad wizard. <PERSON> just doesn't seem to like that <PERSON> is not a very good Head of Department because he hasn't sent out a search party for a missing <PERSON>. 899
<PERSON> is also shown (in various parts of the book) to not really care about <PERSON> security
"... And <PERSON>’s not helping. Trotting around talking about Bludgers and <PERSON> at the top of his voice, not a worry about anti-Muggle security..."
"I thought Mr. <PERSON> was Head of Magical Games and Sports,” said <PERSON>, looking surprised. “He should know better than to talk about Bludgers near Muggles, shouldn’t he?”
“He should,” said Mr. <PERSON>, smiling, and leading them through the gates into the campsite, “but <PERSON>’s always been a bit . . . well . . . lax about security..."
...
<PERSON> was easily the most noticeable person <PERSON> had seen so far, even including old <PERSON> in his flowered nightdress. He was wearing long Quidditch robes in thick horizontal stripes of bright yellow and black.
Harry Potter and the Goblet of Fire, Chapter 7: Bagman and Crouch
<PERSON> walks about the campsites outside the Quidditch stadium wearing his Quidditch robes while all other Ministry wizards are in Muggle clothing.
He is also quite unscrupulous, paying off his betting debts with Leprechaun Gold (which disappears after a few hours), and betting on <PERSON> in the Triwizard Tournament even though he is a judge himself.
However, as much as <PERSON> loves sticking by rules and regulations, these shortcomings of <PERSON>'s can hardly classify him into the 'very bad wizard' category. <PERSON>'s demeanour seems to suggest <PERSON> is almost a dark wizard. Is there any canon evidence (movies don't count as canon) which corroborates <PERSON>'s statement? If not canon, well reasoned answers will be appreciated. 899