Did anyone get the feeling that the Supergirl show seemed to have some kind of internal 'boycott' so that the quality declined faster over the seasons compared to the other shows that were the flagships of the Arrowverse?

I recently finished watching the show, and having watched a few seasons of Arrow and Flash, I noticed this. I tried to search the internet to see if there was a feud between the producers, Warner and the writers and found nothing except the Andrew Kreisberg scandal. On the other hand, Superman & Lois, which is almost a spin-off of Supergirl, seems to have had a much higher level of investment and quality criteria than the show it was derived from.

Do you guys also feel that something happened, or am I delusional?