Started out well, getting worse and worse

Season 1 was refreshing as it showed a new perspective on crime. S2 was still watchable but already deteriorated in my view. S3 was full of cliches climbing further down the ladder. After two episodes of S4 I'm about to stop watching it, but in the media it's getting hyped, telling it will even be shown in US.

Like on stockmarkets and real life: Leave the party when it's best, for me that should have been after S1 where each episode stood on its own, from S2 you have to watch all to understand the plot.