@LokiAsengott
"Well, who didnt saw that coming?"
Correct English is "Well, who didn't
see that coming?"
When you have "do" being used as an auxiliary verb in the past tense form of "did", you keep the connected verb "see" in the present tense. It is
not changed to the past tense "saw". This might seem complicated since you're not a native speaker of English, but rest assured, I'm telling you the correct usage.
Just search "English auxiliary verb usage" (without quotation marks) using google or your search engine of choice and you'll see I'm right.
I see this mistake made frequently by scanlation groups who have no native English speaker/reader on their staff to do proofreading and it's one of those things that bothers me when I see it. I suppose you could say it's become one of my pet peeves. Especially since it's very basic English grammar that even elementary school kids would know.
Example
Correct "While I do go to the park almost every day, yesterday I didn't go."
Incorrect "While I do go to the park almost every day, yesterday I didn't went." <-- You'll look dumb if you do this.
Here are a couple of links to start you off down the correct path:
https://dictionary.cambridge.org/us/grammar/british-grammar/common-verbs/do and
https://www.talkenglish.com/grammar/auxiliary-verbs-be-do-have.aspx