Example of "don't getting it right" as reader...

Falco: I can't become a warrior cause there's someone more skilled than me and I can't surpass them.
Eren: That's good
Falco: bbbuuuttt I don't want this person to become a warrior.

Previously on the same chapter:

Pause*
Because of this:

Back to ch. 97:
Eren thinks: oh... I guess I know this...
*Eren reaches enlightenment*
Also Eren: "Is this talented candidate.... a girl?"
Falco: "She is famous and recognized"
Also Falco: "But I'm powerless"
*Eren feels personally touched by this impotence...*

The whole manga:
*Eren looks at her jealous.... even pissed off*

More canon:
*Eren gets annoyed exactly bc he isn't all-powerfull that she feels like she has to be there to protect him*
In his clueless ways, getting more power means for him not dragging her into the danger... and also feeling more independant (this changes in the future, tho)

Jealous

J-E-A-L-O-U-S OF MIKASA

FFS HE SAID IT LITERALLY HERE!

In Inside, an official guide:
Mikasa

Then, Eren...

Meanwhile Historia:
(To note that freckled Ymir made up a farce to make her enter the top ten and save her just as Marcel lied to make Reiner looks better and save Porco)
Not to belittle her but I don't get why would Eren feels inferior towards her skills. And look at her face...

But forget about this.
None of these canon proofs matters.

It's about Historia. (<--That was the master example of a bad take)