About the wards:
- Sightstone wards last at least 50% longer than warding totem wards, so you need to place fewer.
- Being behind makes it harder to safely place meaningful wards.
- The enemy Morgana only placed ONE single ward more than Karma.
About the damage:
- Karma is still a support, she lost lane, she was up against a longrange ADC that she couldn't poke easily (Cait).
- Her build had low amounts of AP and with an enemy team snowballing against them, squishy supports die too fast to deal damage (or do anything). Any wither/darkbinding/Diana/cait-trap catching her out easily kills her.
Lastly, and most importantly:
Shaming a person on the boards doesn't help them. And Riot has better things to do than teaching people who you find too weak. Try to work on your own game senses and unerstanding, instead of picking the worst person on your team and making them feel miserable.
I can understand the frustration of losing a game, trust me, I do. But try to stay constructive. Keep your heads up. Focus on improving. In the longrun, this will get you so much further!