If this weren't so stupid it would be just a plain lie.

Listen here: what MtGox did for the community is deny and ignore reports about their security being poor for two weeks before being actually hacked, which nearly destroyed Bitcoin. That going from 30 to 0 did not destroy it is a testament to the power and worth of everyone else. What MtGox did do is pose the largest threat to Bitcoin's existence, unsurpassed in the entire interval and likely to never be surpassed.

After that what they did was ignore requests from the community to fix their engine, which to this day consists mostly of lag, alongside a litany of other perfectly legitimate requests I'm not going to bother to list for your noobish benefit.

All the while they sucked millions of dollars from the same community in fees, which they have utterly squandered.

MtGox is the enemy of Bitcoin. More so than any state and more so than any government, more so than any one person, MtGox is the one thing that is Bad For Bitcoin.