Pyke's got a large amount of counters and nullifying his ultimate essentially removes him from teamfights entirely. He's got a 49-51% winrate across all ELOs. He doesn't need nerfs based on that or the fact that you don't like playing with him.
Pyke also shares the gold with his teammates, you aren't being set behind at all. It's just a number on your KDA.
The only situation where Pyke hinders his team is if he ults someone who has a bounty. For example, if Pyke gets a 1,000G shutdown on someone with his ultimate, you only get 300G instead of the 1,000G. I assume this is because of balancing reasons, it would be pretty broken to get an immediate 2k gold boost off of one kill.