Tahm Needs A Way To Get Assists Currently ~50% Lower Than Other Supports

So, I am a support main and I've been playing a lot of Tahm Kench and I noticed something-- even in phenomenal games, my assist count was fairly low, and in poor games, my assists were low or nonexistent. I then checked the average assists for supports and found the following averages.

Bard: 13.05 Blitz: 13.79 Braum: 15.27 Janna: 15.57 Leona: 14.64 Nami: 15.86 Sona: 14.96 Soraka: 14.97 Tahm Kench: 10 Taric: 14.52 Thresh: 14.59

So basically, Tahm is about 30%-50% lower than other supports at getting assists which puts him and the team behind in gold after teamfights, even those that are won. The issue is that he does not have abilities that will give him assists on more than one target. When Tahm saves a carry, there's no bonus from doing so.

Because his kit is so backloaded, Tahm needs to focus on a single target to be effective, which means that he cannot pick up the same level of assists.While it's not the only reason for his very low winrate, it is a huge problem in his kit that I think should be looked at.