The money in english football is completely different, you just pointed out productive spending. It's far easier for teams to pick up players at a lower cost than PL clubs, same with wages. Because of the overall level of money in the English league, transfers and wages are extortionately higher than their european rivals. People have such short memories, we haven't had many clubs in the last 4 for like 2 years. Before that, it was always english clubs in the last 4 for ages. Swings in roundabouts...
We should probably add in the physicality of the Pl making a difference as well to overall performance, also the PL is more competitive throughout the whole league too. Players can't be rested in the same fashion they can in other Europeans leagues. Might as well bundle in the fact that those teams you mentioned, playing a british team is like a cup final for them. All adds to a very tough competitive match that sometimes they lose. Ludograts only just lost to Liverpool last night as well, that doesn't mean Liverpool are suddenly chod.
So precisely how was it that Arsenal got Kos for 8 million and on something around the 60k a week mark?
You are as per usual reciting cliches that simply aren't true, things people just say without any thinking backing it up and certainly no proof.
If Atletico can sign Diego Costa on well below 100k a week, how could Arsenal not. He may move on eventually, he may want wages Arsenal couldn't afford. Almost all players are affordable at some stage.
Picking one good buy amongst many bad is one thing, claiming Arsenal haven't been buying poorly because of that one signing is absurd.
I didn't say every buy was bad, but many have been. Arteta was never a good signing at his age, level he was at and where he'd end up playing for us. Santos, Monreal, poor signings, Debuchy isn't great, 12mil but not actually brilliant and 29 already.
Ozil in a million years isn't worth 42million, he'd be an okay signing at half that but he's still even at 20mil, completely unreliable in big games(and many others). Sanchez at 30mil was also a poor buy, he's completely over rated and just another walcott. He has in every game dropped deep, tried to get on the ball tried to run it and hold on to it... almost all if it resulting in losing the ball and often leaving us vulnerable to a counter. His all around play is poor, it was poor in the world cup, it was often poor for Barca. LIke Walcott he is useful with 1-2 touches in the box before he shoots. He's fitter and more reliable than Walcott, but 30mil on another player who can't actually carry the ball from the half way line to the box? Di Maria can do that and would have cost less than Ozil and Sanchez yet been a much better buy for Arsenal even at 60mil. He was what the team was missing, instead we spent more money on two players that don't improve the team much if at all.
Paying lots for players with massive flaws in their game but most importantly, take starting spots away from already high quality players is simply wasteful. Spending on the players we actually need makes much more sense.
Every single year there are great buys, regardless of how much the club have been spending or have available on wages. Blind isn't getting 200k a week and he didn't cost £40mil, Matic isn't getting 200k a week and also didn't cost £40mil. They are both the type of player that could make a monumental difference but instead we spent more on players we didn't actually need. But they are proof that teams who spend big(when they want to absolutely NOT because they need to), frequently buy great value players on wages we can easily afford.
Diego Costa despite being better than Sanchez cost the same and has made a huge impact on that team. We desperately needed a striker of his quality and instead bought Walcott Mk 2, and on similar wages.
We could desperately have done with Fabregas for 30mil and again on reasonable wages... but instead threw money away on other players.
There is example after example of "big" teams with all the money making great value purchases, in transfer fee and wages that Arsenal can absolutely afford.