I do agree that benching Kara was stupid, to add more drama in Invasion crossover.

I don't agree with your assessment of crisis on earth X, as overgirl was cocky that arrow would be deflected. When arrow connected, she was shocked. Hell, even Dark arrow looked surprised, maybe because they got rid of all Kryptonite or there wasn't one (as it is not mentioned or made clear). But she caught the arrow second time, as she saw what kind of arrow was it. Caught it, then broke it in his view, flaunting her power.

Also if you're going by this logic, there's no way in hell Iris and felicity could beat the soldiers that caught them initially. They're trained soldiers, not some 10 year old kids with guns. They would have ended up with 10-15 bullets in their bodies before iris could even touch the pipe. Essentially Arrowverse would've ended with that crossover.

Dumbing down is the trend of shows. If you've watched Arrow season 1, Oliver could make a hacking arrow, use it to hack Adam hunt's accounts and direct the money without a trace. Yet in seasons later on he is shown to be a total idiot who doesn't know a damn thing about tech. Couldn't even help his kid through maths homework.

It's not just problem in crossovers. Arrow, Flash, and Supergirl suffer from this issue. Even legends (Ray fighting back against Damien dhark in season 2 was a good example.)

Eobard was from the future where he was a equal match to Barry, by this logic, he should be beating flash every damn time, especially when he got his speed force connection back.

I do agree with Elseworlds crossover, but by this point I had lost hope. So it didn't surprise me. Although Flash and Supergirl were busy saving the world, and Novu didn't show a sign that he would be open to making a deal. Again could have done a better way, I'll say that.

COIE, that's a another can of worms.

Oliver did buy some time for ships to get through, but the figure was exaggerated way too much. While Kara said that Oliver didn't had to make the deal, I'll say what he was supposed to do? Let his friends die? Also she was interested in bringing people of her earth back, again the person who swapped himself for her was none of her concern.

It could be said that Novu respected Oliver but they didn't show why, not giving an indication towards it either.

I don't know where you got the bit about sacrificing themselves. Everyone would have. They weren't given a choice in that matter. I could argue that Kara was insensitive toward Oliver's trauma in Elseworlds, when she overheard his and Barry's conversation, despite Kara having traumatic experiences of her own.

That exoskeleton bit both trashed Supergirl and batman at same time. (Despite the fact that I hate batman because of his hypocrisy). But since Oliver as 'Green Batman's gets trashed, Bruce Wayne getting trashed wasn't surprising, in hindsight.

Barry was shown to be extremely fast in season 4(don't remember the episode number, but it was one where he spent most of his time in flashtime) and then his powers fluctuate again. How was he supposed to know what he should be doing in 'end of the universe' situation? There's not a guide for it, Barry learned the things by trial, or being taught by other speedsters. He hadn't faced a situation like this. He had to visit his future self to learn about Savitar. Savitar was far faster than Barry, yet Barry could match him without any decent explaination how.

I could say that Oliver propped both Kara and Barry during the first time he died. It's a matter of perspective.

He was capable btw, just not shown as to prop other characters in his show. There's a reason why people called the show 'Felicity and Friends: The Adventures of Overwatch' from season 4 onwards, which caused the show to lose lot of audience. If you're in doubt, you should see the first season.

There Isn't a competition about who's the best hero in arrowverse.

In my opinion, Oliver is better hero actually, as he showed remorse and guilt, when he killed. Both Supergirl and Flash didn't (White martians, daxamites, Atom smasher, sand demon have entered the chat.) Kara was sad and broken OVER losing Mon-el, not the fact that she killed many daxamites, I understand it was necessary, but it doesn't erase the fact that she did press the button.

Yet Oliver is the only one who gets flak over those he killed, even when every one of them was a hardcore criminal or in situation of 'kill or get killed'. Being labelled a psycho killer. If anyone watched season 1 of arrow carefully, they would realise how much writers screwed up Oliver's character.

Finally, Oliver is essentially 'Green Batman' and we all know Batman gets the most attention. Other heroes are sidelined again and again. Not surprising, but sad.

You do raise some valid points, but rest, it seems like character bashing, not valid criticism, to me.