The only two CW superhero series I did watch more than three seasons was
Smallville and
The Flash. I watched all ten seasons
Smallville but stopped at about season six (I think) of
The Flash.
Arrow was decent. It's just that I never bit on the show during the few times I tried watching it.
The CW kills me. I could not stand
Legends of Tomorrow and I do not know how many seasons it ran. I enjoyed
Naomi but it was cancelled after one season.
What is even more funny is that I refused to watch
Naomi ON The CW because I thought it was tainted for just being on the network. Then I started watching the series on HBO Max on a whim about two months ago, made it through the season finale, checked for any news on season two and BAM! Cancelled. Just my crazy luck I guess.