What do you think was the worst thing this game experienced from 2.0 until now?

[Bourne_Endeavor]

For me, the worse things that come to mind were how badly SCH was nerfed at the start of 4.0. Another sin added for the devs thinking that bringing a job down instead of the others up is how to fix things. The exception is over-tuning AST. I'm adding another sin for that BS. This felt like a parent giving in to their kid's constant cry for cookies so he/she just gives them the jar and says, "There! now STFU!"

Ha! That is such an accurate analogy!

Eh, not really? Astro's absurd buff in 3.4 came out of pure desperation. It was actually pretty decent in Midas but had developed such a strong stigma due to its horrendous launch, people just refused to play it, let alone groups still favoring White Mage. The devs basically said, "Please play this job! It's better now!" Why that buff lasted into Stormblood at all remains a mystery though.