Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
Infernape seems good on paper but mainly has issues into #1 used mon Gapdos, along with generally suffering into Noivern and Slowbro + Geezing. It also really wants to run everything at once but just can't. It is an ok-ish mon but generally it's just kinda outclassed. Special Sets don't do the best into various cores, especially Tera Poison Umbreon, and Physical sets, as mentioned don't do well into weezing or slowbro.
Hey I'm kinda new to teambuilding and I saw rhyperior is ru and had been wanting to use it for a while and was wondering what team dynamics it fits best and what members synergize with it most