I sometimes think I just suck. I am mostly a F2P (I've done the welkin maybe 3x and BP like 3x too), and have a healthy amount of 5 stars both in characters and weapons. Yet I could only actually 12 star abyss when it's like stupid easy. I usually get like 10 stars.
I just don't think I make good teams or invested poorly. I have most characters with decent/good artifacts, leveled to 80 minimum if I use them in abyss, weapons 90, talents at least 6, on carries I have am usually crowned.
I have TONS of resources. Over 1k purple books, over 25M mora, tons of fragile resin, and gobs of other enhancement materials, just not sure who I should be investing in.
I have a C2 Eula with her weapon thats my favorite. I got stupid lucky here. I have a Xiao with a Homa with 90% crit and 180% Cdmg. I also have a Hu Tao, but if I give her Homa, I don't have a great weapon for Xiao.
I hate that I used a ton of rolls on him, because honestly his E skill just isn't fun to play around
Fucking C6....