I feel like a lot of EU fans understandably portray that series from a viewpoint that is as charitable as possible to the EU team while neglecting to apply the same charity to their opponent.
The first thing to point out is that while MAD was briefly in a winning position in game 4, the lead was tiny, and the gold was still even. While MAD was farming ghost/beryl and getting lots of kills, DK’s solo lanes had both topside turrets down to one plate. A lot of the gold swing didn’t come from the kills, it came from Khan taking first turret top during the dive and canyon/Showmaker taking mid turret immediately after.
So one thing to consider is that even if MAD called off that dive and no one died, they would’ve still been in a 1-2k gold deficit afterwards, because the top lane turret still goes down and probably the mid lane turret as well. I don’t think that game 4 was as much a throw as some people like to argue.
The other thing is that no one talks about DK being in a winning position in game 2 before throwing that one. There a bit of a double standard in that the series was just as a close to being a 3-1 where all DK’s wins were 25 min stomps as it was to being a MAD win. Everyone talks about what if MAD didn’t “throw” game 4, no one applies the same thing to how DK would’ve been up 2-0 had they not thrown game 2.
So while I agree that your core point that MAD has challenged a top LCK team in the past is decently valid (and the “Vedius is clueless” comments are completely assholish), I think the way that EU fans like to portray that series shows bias in a subtle and mostly innocent way.