Explosive gadgets need a buff.

Now it's a gunplay-focused game like CoD. That's why those vehicles, C4s and RPGs are nerfed. If you expected the "battlefield" series, it's a wrong address.

Had the same issue but what makes worst is that unlike grenades or other explosives c4 have a short range, take time to deploy and detonate (2 separate actions) not to mention you leave your self wide open. 

I'm not saying it needs a super buff but is should be able to kill at least 1 player if it blows up on their face

I agree. I've experienced many times where an RPG would have gotten such a good multi-kill, only to get suppression score. There is not enough splash damage on explosives at all. 

Maybe the buff need to be added if you shoot structure or building in the same time and no only a buff for escape people who rush send 1 C4 and boom .

It's not a good idea to have game with full people play Grenade launcher .(my opinion)

I usually use c4 to set traps but this time I was attacking a base. Sniper isn't helpful on tight corner and the pistol isn't guaranteed to kill 1 enemy specially assault. So i threw the c4, was spotted, blow the c4 and died, both enemies survived. Wouldn't have minded if the c4 was not close enough but it was literally on their face. I taught i had won but was shot to hell afterwards. No time to do anything else

Don't mind dying since it was close quarters but at least 1 of them should have died. It was an ambush I was using my motion sensor to steal a base

Basically all the explosives are weak in this game, RPGs, C4, Grenade Launcher, even Tank shells and other vehicles. Like you said unless you get a direct hit with any of these it will not kill. The explosion part barely does any damage. I've shot tank shells next to infantry's feet and it does 20-60 damage. That should be a kill every time.