Not sure I 100% agree. It has been largely pish, but did have some classic moments.
The two big battles, although full of flaws and improbabilities, were pretty spectacular.
If they had only used the earlier episodes better to develop story-lines instead of just being padded out filler, then it might have been better.
The big difference with old GoT and the new GoT was typified last evening. As Jon Snow is getting accompanied along the docks, in old GoT he would have got his throat slit by an Unsullied who was disguised as a Black Watch guard. This all being watched on by an vengeful Greyworm. Instead it was a happy family goodbye with the Snows and producers and writers thinking of numerous spin offs with the cast.
All TV shows suffer it when they get successful. Jumping the Shark.