With the recent Chimera update. DE added a new option in the display settings called "Effects Intensify".
This allows you to control the bloom brightness it seems. And it is greatly useful against Ignis. Below I will leave comparisons of Effects Intensify 10 vs 100 (Both with adaptive exposure ON as that also helps a bit)
I will also leave real TTK tests of Ignis Wraith against Stock excalibur (145 Shield, 110 Health, 110 Armor)
So another advice. Play the TTK gam