I will try to say things less vehemently than you, and then will mortify myself by becoming a simple lurker.
Mr Fixer is not an easy hero to understand. He asks for a very specific way of thinking, for tactics very different from what we use with most other heroes.
His two card structure, and the number of replacement in his hand, make him very resilient to ongoing/equipment destruction. If he loses something vital, Meditation and Salvage Yard allow him to get it back easily. He does not need a big hand, and so easily sacrifices it for the sake of the team when discards are needed.
The trick with him is not to keep the same styles and tools for all the game - he changes them as needed. He is a Zen guy, and is not emotionaly attached to his cards
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This is not anecdotal evidence : it is the way I, and some others, play him, and by playing this way, what at first seems to be unbearable weaknesses are outshined by his strengths.
He is not the only hero that can seem weak, or counterintuitive, at first, until you understand how he is "supposed" to work. Absolute Zero is seen by some as a weakling, by others as one of the more potent heroes in the game. Many players have conceded that they thought Nightmist bad at first, because of her self inflicted damage and her habit to discard cards. Tachyon and Unity both discard many of their cards without using them, to power their own tactics. All the heroes ask for you to take the right "state of mind" to play them effectively. Mr Fixer's role and tactics are one of the harder to grasp (Expatriette too, it seems).
For me, discovering the "good" way to use what he has was a puzzle I enjoyed solving (and I don't think I've entirely grasped it yet). And I will repeat it vehemently : he is now a hero I enjoy having in a team, not a dead weight.
Of course, we can change his power, to make him easier to play. But I find more interesting to compare our ideas and tactics about how to best use what he already has. Both Fixer and Expatriette are challenging heroes, yes, but very gratifying once you understand them.
But you are firmly convinced Mr Fixer is simply a bad hero, and I know I won't change your mind. So I'd better activate Stealth.