Worst champion in the game?

I'd say Supreme IM.

0 synergies that'd boost him (afaik)
Even with unblockable specials he is no threat at all.
Also, Groot's SP2 catches me off guard every time. I still can't dex it

Thecurler

Rhino

Chobbly

There's lots of sub-par options that are equally as ineffective at one another across chunks of content outside of Arena. For every Rhino I raise you an awakened Iron Patriot, or for Ms Marvel Classic I raise you a Superior Iron Man. This isn't intended to be negative, just that there are a number of original champs from early in the game with limited utility.

Specifically I can think of one which is spectacularly bad - DDHK with Suicide Masteries. While there are a lot of champs who suffer with ouchies due to special rotations, DDHK can defeat himself without the opponent landing a single blow.

laserjohn26

I won't include really old champs, only what I would consider the modern Era, and I would say jubilee.

Fantomaxop

Awakened Iron Patriot is literally getting healing just to remove all of his own abilities afterwards

I remember pulling him as one of my first 4 stars back in a day, it felt so awful to awaken him....
Name me another champion that can seriously harm himself THIS MUCH with signature ability, i dare you

ahmynuts

Ghost/Herc

I'll agree for the opposite reason as to why we all say champs like Groot

Bulmkt

There are too many to list…

SagaChampion

Bunch of bananas

MasterA

Ms marvel

unknown

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DrZola

Drax would like a word…

Dr. Zola
Iron fist is trying to find Drax in the room so he can hold his beer.

I’m just impressed there are so many Drax users on forums. Please share gameplay…

Dr. Zola

BeastDad

There are a ton, but the worst of the worst are:

Groot
Superior IM
Captain America's
Dr Strange
Iron Patriot
Civil Warrior
Drax
Ms Marvel
Captain Marvel
Cyclops's

Greekhit

Awakened Iron Patriot is literally getting healing just to remove all of his own abilities afterwards

I remember pulling him as one of my first 4 stars back in a day, it felt so awful to awaken him....
Name me another champion that can seriously harm himself THIS MUCH with signature ability, i dare you

Nightcrawler loses a lot of his defensive utility when awakened.
Offensively he is better, but his signature ability the upper it goes, the easier it makes it to fight against as a defender.

PantherusNZ

Awakened Iron Patriot is literally getting healing just to remove all of his own abilities afterwards

I remember pulling him as one of my first 4 stars back in a day, it felt so awful to awaken him....
Name me another champion that can seriously harm himself THIS MUCH with signature ability, i dare you
Nightcrawler loses a lot of his defensive utility when awakened.
Offensively he is better, but his signature ability the upper it goes, the easier it makes it to fight against as a defender.

Higher sigs don't have any effect on it - they just give him more attack boost when he inflicts his bleeds. But you're right that awakening him makes him a worse defender because you can force the stance switch quicker.