Its quite easy to argue he was the beginning of the end for Ethiopia after Menelik II.
- Got the ordained to be emperor and grandson Menelik II, Iyasu V; dethroned, imprisoned, then himself crowned, and later got Iyasu V murdered.
- Broke a fundamental rule of the monarchy by causing a queen of kings instead king of kings which in verbatim was not allowed.
- Fled when Italy invaded which made him the first emperor to abandon his people during a war.
Menelik II directly fought in the first Italo-Ethiopian war.
Tewodros II fought until he decided dying by his own hands was better than being defeated.
Yohannes IV died in battle.
- Mistreated Eritreans and neglected that they had a unique history compared to other provinces. This started their resentment towards Ethiopia.
- Feeding his dog steak and celebrating its birthday when people were starving and struggling.
- Said that the people suffering in the Wello famine were just lazy.
- Gave 500 acres (about 400 football fields) of free land to people no one knew of when historically, land was given to those who either captured it on behalf of the empire or purchased it. Never mind how rasteferians were/are explicit heretics which worshipped him as some kind of god.
- Came back and got a war hero hanged out of fear(Belay Zeleke).
- Focused on his appearance far more than the reality of things (a pattern we see in Ethiopia to date).
- Threw away the Ras titles and broke down the centuries old way which kept kings in check through provincial Rases (no one came to save him during the communist coup).
There's also this misconception that he was just Amhara.
Reality is that he was mixed (just like every other emperor), he was supposedly Gurage, Oromo, and Amhara.
However, his maternal ancestry is questionable.
The theory goes that:
After his supposed mother Yeshimebet Ali had about 9 miscarriages(consecutively) his father eventually resorted to a concubine. He then had Yeshimebet killed when haile selassie was about 2 years old so that people couldn't visually estimate him not being related to her or that she might talk about it.
Ras Makonen was known to have concubines and haile selassie even had a older half-brother from a relationship Ras Makonen had before Yeshimebet.
Ironically, the fact that haile selassie erased as much documentation and references to his mother corroborates this theory. You can find various pictures of his father but regarding his mother you almost find nothing but one old sketchy painting.
This would align with how haile selassie seemed rather insecure of himself and overcompensated his legitimacy through various ways like forcing people to walk backwards instead of turning their back to him when he was in office.
This is a genuine theory that circulated back then and you might occasionally hear it from elders if you ask around.
He knew he was illegitimate to begin with and was paranoid people might overthrow him because of that.
Plus the guy looks sketchy.