I had a feeling you’d be here.

Nightmare Moon? Jealousy for the love and support her subjects had for Celestia and how they constantly ignored her and the night she would weave for them.

Discord? He was an immortal Spirit of Chaos, any friends he could have made would pass away from old age and his heart was closed off to them because of it. It was in his inherent nature to spread chaos and disorder.

Queen Chrysalis? Motivated to feed her starving Hive.
“When faced with extinction: every alternative is preferable!” -Dr. Leonard Church, Red vs. Blue Reconstruction

Sunset Shimmer? Found out that Celestia was using her as an unwitting pawn in trying to defeat Nightmare Moon and had no intention of actually training her to reach her full-potential to ascend to Alicornhood, she was even paranoid that Celestia will throw Sunset away when she completed her task.

Tirek? Seeking to gain power in order to prove to himself that he is indeed worthy of being a ruler and not a failure to his father King Vorak.

Tempest Shadow? Ostracized by her only friends due to her injury and was considered an outcast of Unicorn society, she sought out to try and reclaim her Horn and control over her wayward Magic but her motivation decayed with both time and desperation to the point where she led a full scale invasion against her homeland, captured the nigh-immortal rulers, and enalaved her own kind: all to try and reclaim her horn.

There it is; I answered your question as plainly as possible and you still insist nothing was said. You’re willfully blind.

Now that you’ve proven that, there may be no point in my attempting to explain any of this to you, but here’s one last try: Chrysalis witnessed the world-bending power of friendship multiple times, was beaten by it multiple times, used it herself to achieve a goal, and still rejected it. As no sensible person thinks this way, it is not unfair to conclude that Chrysalis is an idiot.

1. Chrysalis has never, as you claimed, been directly defeated by the magic of friendship. The first time was love magic, as was the second. The third time, she was betrayed by her underlings who were destroyed by the Tree of Harmony.  
2. You claim that “no sensible person” would reject something they know to be powerful. By this logic, no sensible person would reject recreational nuclear weapons. Simply put, power is not the only thing one should or could prioritise.  
3. That the LoD cooperated to reach their goal does not necessarily imply friendship. That only came up after the job was done. At no point after is their alliance referred to as a friendship or treated as such, but their cooperation continues.  

There are people that preferred slavery, rule by kings, and quite a few other horrible things that better people rejected and left to rot. If you need proof that there are insanely stupid people who will fight against their own best interests (like Chrysalis did!), look no further than right-wing voters in the United States (or don’t, if you value your sanity).

Preferring the stupid, inferior, old way doesn’t make it good, it means something is wrong with the people who prefer the stupid, inferior, old way.

What needs to be clarified, and what you have failed to clarify, are the actual specific claims you are making. You say she “She rejected the evidence of her own eyes and ears on multiple occasions”, but what specifically are you referring to? What evidence are you pointing to and what is it evidence of? Further, what actions specifically do you claim are indicative of stupidity?

As it stands, I cannot address your statements without making unjustified assumptions. That is why clarification is needed.

Apparently, she does not agree with that summation and neither did a not-insignificant number of changelings, even after Thorax took over. I refer, of course, to the renegade changelings mentioned in Triple Threat, as well as to Pharynx. I’m sure you recall their preference for the old ways. I have no doubt that Chrysalis has similar feelings on the matter.

If you’ve watched this show at all, it shouldn’t need clarifying.

Yes, changes objectively for the better; they would have enough to eat now. Something she was never able to give them. She left them when they were at their best, which is idiotic.

As you have yet to sufficiently clarify your somewhat confusing point about pride and “the evidence of her own eyes and ears”

I’m sure I can’t be the only one who doesn’t see the logic in basing the destiny or duty of a species, or an interpretation thereof, on wordplay. At any rate, it was quite obvious at the moment of her overthrow that the Hive would undergo some major social changes in the wake of Thorax’s metamorphosis. While she may not have literally lost her Hive, it is inarguably true that she lost her hive, if you see what I mean.

She didn’t ‘lose’ her hive, she abandoned them rather than do the one thing her species is supposed to be able to do; change.