...I'm sorry, I'm not normally this mean, but if I don't say something, you are going to float around on this concept that you are right. You are bad, simple as that, you are...bad. You are bronze V and from simply looking at your match history I can tell you are. Case in point, you are whining about Pantheon while playing Volibear, a champion that can actually survive his laning phase because you can build pure tank then out DPS him as long as he doesn't snowball. On top of that, your build is beyond trash and yet I bet you are one of those people who think scrubs are keeping you from climbing right? No, your shit builds, inability to adapt and whining about every champion rather then learning how to properly play is.
Stop build Zerkers on Volibear, unless you are STUPIDLY far ahead and building heavy AD, it is a bad idea and even then, it is a bad idea. You were fighting a near full AD comp and instead of doing the smart thing and build tank...you build damage, you do know that because of Volibear's W, he gets MORE then enough damage on top of survivbility building sunfire right, especially with how powerful cinderhulk is right now.
All in all, Pantheon isn't OP, you are just bad, the sooner you realize that, the sooner you can improve.
Edit: For the love of god, please PLEASE stop building heavy AD on Volibear. He doesn't need it, his natural kit has more then enough damage to hurt the threats of the team, IE, the squishies if you build tank. You can get ONE attack item on Volibear, besides that, build pure tank, hell at times it is better to simply build pure tank, you really can honestly survive without a damage item on him as long as you didn't feed.
Randiuns, Sunfire, Spirit Visage and/or Banshee's Veil, Warmogs, THESE are the core items for Volibear, build them.