<Snipped quote by Sep>
Also the only reason I watched it. I falsely thought the crossover was going to have important details I'd need to know for The Flash. It didn't. But by that point I had already invested a decent chunk of my life into it, and the other seasons were going to crossover with the other shows now, too, so I watched the second season. It's just so bad. I gave up watching it sometime in the third season. I'm sure I'll eventually continue for the next stupid crossover, but I'm a masochist like that. Though, to be fair, I haven't finished the latest season of Arrow yet.
I've not finished Arrow, LoT or Supergirl. I watch Flash through the bad cause he's still my favourite Hero so... there's that.
I got really pissed when I watched S02 of Supergirl for the Crossover then LEGIT, the only appearance of Barry in episode was repeated in The Flash. I don't know as I've not got that far, but I own The Flash on Prime, and Season 2 of it holds both episodes of the crossover. The Arrow part and the Flash part (it was the start up to the LoT) so I'm hoping that's the same for later seasons but I doubt it.