I think there is an expectation these days though, right across the spectrum fans expect a higher quality to what they see, where as before many would excuse TV for under par effects and action. Look at AoS, it took a lot of stick early on for poor fight scenes and effects.
TV effects have improved just as film effects have, though not as rapidly. Of course, there are expectations with any line of work. Criticisms fly all you from all directions in the entertainment business, whether it's in TV or film. You cite criticism of AoS's VFX, but we can also cite criticims of the VFX in dozens of recent films. Expectations have risen in each medium when it comes to VFX, but not to the point that most people are expecting television VFX to be completely on par with the film VFX.
Planning, staging, framing, and creativity are key in TV action sequences -- just as they are for film. I think the people involved with The Flash's VFX (along with Arrow to a similar extent) have excelled so far in what they've been able to accomplish. Are there shoddy moments? Sure, but a hell of a lot less of them than most of us expected there would be.
The thing is movie budgets have gotten bigger and bigger over the last decade, TV budgets haven't, yet people expect the same contextual increase in the quality of action and effects. Another thing to consider is that unlike with a movie you can't suddenly push back the drop date, if you aren't ready on time you are screwed.
What people? What are you basing that statement on?
And again, we're still comparing apples to oranges here, and we can go back and forth on this subject all day. Pushing back film release dates isn't the most common occurence in the industry, but you're comparing two different platforms that (once again) have different goals, production cycles, and marketing/business strategies. While a movie can be shelved due to production problems or pushed back because of delays or production changes, a TV show can easily be cancelled or showrunners and creative teams can be dropped or replaced (which happes often these days). Budgets can be cut or added to.
This discussion doesn't boil down to something as simple as "Well, movies can do this and TV shows can't so Amell's right and you're wrong." My original point was that there are counterpoints to be made if you look at this objectively, you can see it from both side and not declaratively state that it's harder to do one or the other. Not once have I suggested that what Amell and the CW are doing is easier than what someone like Zack Snyder is doing with BvS. I just regonize that there's more than one way to look it at and because there are SO many different variables and factors between the two platforms, there isn't a clear comparison to be made.
I doubt Amell made his comments lightly, he does work in the industry and I am sure knows a lot more than either of us as to what the process takes in fairness. I also didn't see it as him complaining, just simply stating his opinion based on his experience first hand.
Actually, in fairness, Amell has never starred in a big bugdet action/superhero movie. In fact, I don't think he's ever been involved with ANY big budget Hollywood film. When he has the chance to star as Green Arrow in a feature film where he'd have months of pre-production and training, then shooting nearly non-stop for several months or longer and getting involved in the post-production work that's required of him before embarking on a 2-3 month press tour around the world -- all while he has a chance to see what it takes to make a feature superhero film --I think he'll be able to look at this a little more objectively and with less of a bias than he surely and rightfully has now.
As for the crews not complaining, no one wants to lose their job, in this situation you rely on the guy with the safety net in the production to be the voice for the show as he's not going to be fired.
They're also not complaing because, ya know, they're professionals who are good at their jobs and can handle the work loads they've taken on. Making movies is hard work. Making a TV series is hard work. If you can't handle the heat, get out of the kitchen.