Helping a losing lane is currently far too risky for the reward

I just had a game where I was mid lane and slightly ahead. My bottom lane was losing and the ADC was tilted. After pushing the enemy mid out of the lane, I roamed with our jungle to bottom lane. In total, we came away with 8 kills, with most of the killing blows going to the ADC.

The rest of us, who were playing well, received basically nothing for the roam because the 150 assist gold on each kill was split 3-4 ways. We then proceeded to lose the game, because all of the gold was consolidated onto the tilted ADC, who was playing terribly and ultimately threw the advantage twice in a row.

This feels terrible, and demonstrates how out of sync the risk of helping a losing lane is compared to the reward. The game would have been easily won if literally anyone other than the ADC had received the kills.

It would be much better if kill gold were more evenly distributed amongst all participants. As it stands, it makes absolutely no sense for 3/4 people who took down a champion with a 1000g bounty to only receive 50g for it.