I recently watched it for the first time, I thought the first couple of series were brilliant and then it seemed a bit all over the place.
Been a whilst since I watched it but to me it felt like they’d written lost to run for about 6 seasons then it was so popular the television companies demanded more - so they dragged it out.
I think it’s around season 3 & 4 where there is a lot of Michael running around just going ‘they took my son’ & shouting ‘Walt’
It’s one of those shows that’s a decent watch the second time round because there are so many things right from the start that feature later on. The most obvious one is Locke holding the draft pieces black & white also when Sun thinks she’s pregnant & takes a test it’s a Whidmore branded one despite the fact they haven’t even been mentioned yet.