Keep in mind that every shade is different.
I don’t know how many shades you tried, but it could be the case, that the only/few shades you tried were particularly hard.
Some combination of skills are incredibly hard.
Also if you are filling up quest echoes and discovering Vessels and Beacons you can save them up and do them all in a row, to let modifiers run out, just before fighting the shade, to make that fight even easier.
You can also repeat a given shade as many times as you want.
The same shade node on the echo Web will always stay exactly the same, so you cN actually try and learn the fight/patterns.
In case you are interested you can also check out my video about the Shade Of Orobyss, showcasing literally every single ability of this boss.
If a particular shade feels impossible try another one on the echo web.