Quoting myself from the post you're replying to:
[Hank] did leak copious amounts of information of their investigation to their lead suspect, which probably prevented the DEA from getting to Gus Fring before he died in grandpa explosion.
Catching Heisenberg would probably give him some props, but he did unintentionally sabotage the investigation for months and acted extremely unprofessionally. Also, Hank's a proud man, even if he wasn't fired you think he could continue working there? The ASAC before him left because he had had a personal relationship with Gus but had never figured him out, and Hank was A LOT closer to Walt than what's-his-name was to Gus. Hank would assume everyone in the office to either pity him or think of him as a fool, and Hank doesn't strike me as a person who'd thrive in that environment. When he had to show weakness to Marie he acted like a 4-year-old with a temper tantrum. Imagine feeling like that in his workplace?
Do you even know what honor is?

• A horse.

I really don't understand how cracking the Heisenberg case and putting the biggest drug kingpin behind bars and putting a stop to that chain of violence would kill his career? Maybe it's just me.

Yeah, don't believe either one of them wanted that tape going to the DEA - just a bluff Walt was hoping wouldn't need to be called.
Marie even mentioned Hank should get ahead of it and take it in right away, but Hank then would not have had the opportunity to hunt Walt down and clear his name ahead of time, like he would have done with the cell call confession.
Even if the tape got turned in, and Hank was cleared from wrong-doing, the damage would be done, as far as working at the job he loved. This may have still happened, even if Hank caught Walt in the end. But if he's going down either way, at least Hank gave himself the chance to catch Walt.

I too think Hank should have turned that tape in right away, taken direct action. Walt admits to being Heisenberg (or well, "the chemist") on that tape, after that it would only be a matter of disproving Hank's participation which shouldn't be too hard - the only "evidence" of Hank's involvement was Walt's word, and who would the DEA be more likely to believe, their own ASAC or Walt? Hank's incapacitated for much of the show due to getting shot and being driven into the traffic by Walt and such anyways, so there must be times when Heisenberg has been very active and Hank's been out of commission.
I do think Hank was right in his assertion that his career was over the moment he turned Walt in. He did leak copious amounts of information of their investigation to their lead suspect, which probably prevented the DEA from getting to Gus Fring before he died in grandpa explosion. Explosion which, by the way, happens
while Hank is under constant police supervision at his home

• which seriously contradicts with/disproves Walt's direct claim that Hank gave that bomb to Hector. Sure he could have done that when Hector was visiting the DEA, but no one would have noticed that? Please.
  But I don't see why it would have made any difference if Hank had turned in the tape - which obviously would have led to Walt's immediate arrest, even if someone did initially believe the BS he was spouting - or gone rogue like he did (except of course Hank and Gomie would be alive.) They would know Hank didn't murder Walt because well, Walt wasn't dead.
  Do you even know what honor is?
• A horse.