I never knew what Evs were and now my team Evs are completly messed up but I love competitive battling will that affect my Pokémon that much?
Yes, yes the will. If you have the right EVs for your Pokemon, you will be a force to be reckoned with. And if you don't, have the right EVs or non at all, you will get pwned. It's simple as that, from my understanding anyway.