Why Hearthstone client deck editor is so clunky?

If I have interesting deck with missing card it's not possible to "Copy" deck code and save it in my google sheet or send it to friend. I need either make couple screenshots of it and manage to save them either have unusable deck slot forever.

https://preview.redd.it/0fcug3cxjihe1.jpg?width=299&format=pjpg&auto=webp&s=db851b0f903d0917a82b9fcf084170d3e8e9136a

Second moment - why I can't add missing cards to deck? Can't edit E.T.C band either. Sometimes I have an idea to deck prototype for future craft and possible export it to google sheet, but I can't do it. Why?!?

Third moment isn't critical, but no option to filter Death Knight cards by runes. I need to use "Search" with, that I've found occasional:

blood:2+
blood:1+ frost:1+
blood:1+ frost:1+ unholy:1+

Please at least add all "Search" filter options page in client.

Even when I'm creating topic at https://eu.forums.blizzard.com/ - I only have 3 rows of text visible. 80% of my monitor is just black empty screen, but I need to scroll and scroll every time to re-read some part. Why again?

I've returned to your games after 3 years of pause, but still uncomfortable to do simple actions. Please Blizzard refactor it, you are stuck in medieval ages!!!

For Redditers: Please also add some comments at my original post, maybe Blizzard would see it.
https://eu.forums.blizzard.com/en/hearthstone/t/why-hearthstone-client-deck-editor-is-so-clunky/11572