Well, personally I hope BVS and Justice League are better than Arrow and Flash (which they should be considering the advantages they have, being big blockbusters and all), but going by the last film MOS, they wont be. Oh, an all those criticisms that you made their are your opinion, but for most people the positive outweighs the bad when it comes to Arrow/Flash which is why both Arrow/Flash forums are mostly full of praise for both shows. In comparison, every MOS thread ends up with most people criticising the movie and a small but loud minority complaining about all the negativity, so much so that a thread was made where only positive comments are allowed to be posted. As many complaints that can be made about Arrow/Flash, even more can be made about MOS and far more will agree with that than disagree.
It is not just "some fans and some critics". Arrow and Flash have been received positively by most fans and critics and that can be seen on most sites and forums. They are not held in as high esteem as DD or the best shows on TV, but it is still mostly positive when it comes to them. That is far from the case with MOS. If Arrow and Flash were on a major network they would have more viewers and better resources. They would be even better than they are currently. When resources, limitations and restrictions are taken into account, Arrow and Flash really are wiping the floor with MOS. MOS has much more resources at its disposal and it is still much more divisive amongst people than Arrow and Flash are. Arrow and Flash punch above their weight. It was the opposite with MOS.
Go on any forum and site and you will see that people are far more positive about Arrow and Flash than MOS. You wont see any threads being made where you can only say positive things about Arrow and Flash any time soon like you have with MOS. Arrow and Flash are not considered to be as good as DD by most people, but it I still mostly positive with them. It is not like that at all with MOS.
Well, you love MOS (and it is seen by most people as a poor film) and even consider it to be better than Batman Begins, despite that being something that not many people would agree with. So I am not so sure if what you say is true.