The correct way to parse "就打赢了" in 是个很普通就打赢了的对手哦? I was reading an excerpt from a story, and I'm having a discussion with my friend over the correct way to parse this line said by a certain character, let's call him 1, about character 2.

是个很普通就打赢了的对手哦

2 overhears this and reacts angrily.
The difficulty stems from the target of 打赢了.
I believe the line would translate to something like this:

It was very common to win against this opponent.

My friend tells me it's more like:

It's very common for this opponent to win.

But if character 2 reacts angrily, isn't that a provocation? Which would mean mine makes sense in the context.
Any help with understanding the correct parsing will be awesome!
&quot;是个很普通就打赢了的&quot; is an adjectival phrase for &quot;对手&quot;

是 - is (verb)
个 - a (classifier for the noun 对手)
很普通就 (just easily) 打赢了(defeated)
的 (adjectival phrase marker)
对手- opponent [noun]

就 here means &quot;just&quot;
&quot;打赢了的对手&quot; = &quot;defeated opponent&quot;
&quot;是个很普通(就)打赢了的对手&quot; = &quot;is (just) an easily defeated opponent&quot;

'普通就' is short for '普通地打就' (just fight normally)
Other example of '就' functions as 'just':
一美元(就)卖了 = sold (just) for one dollar