(rant) Op kits in pvp kits

I've ranted about this before, some people agreed, some people disagreed. To keep peace, please post your opinion in the comments, but be CHILLLL.

Everyday after school I hop onto Mc origins to play PVP kits. I like to practice and have a good time. Theres a problem though.
Ok, it's only fair that if you donate you get something in return, but some of the kits need a bit more rethinking, in my opinion. A donator could come into my fight, whether it be in the sky, in the water, or on the ground and knock me out in 2-3-4 hits. Not every kit, but most.

1. Strafe kit
This kit has an enchanted diamond sword, full iron except for the enchanted chain chestplate and to top it off, speed II effect. It's almost impossible to hit them at times.
Strafe against Knight is an easy battle.

2. Percy kit
This is a 2-3 hit kill on Knight depending on how fast you work and a 1 hit kill on low armoured kits such as Archer, Shark, etc. I believe that it does double damage in water?

I have a problem with more kits, but these two kits are my least favourite kits as the user who is using the kit has a massive advantage towards other players who are new, don't have a rank, or can't afford other kits.
You could say it's almost like a pay to win, as the kits are over powered. I will respect your opinions if you can respect mine, all I'm asking is to maybe make other kits that are free a bit stronger so in battle, everyone and everything is equal, or at least to a point where we can actually kill them without souping every 5 seconds. Nerf it.
cheers.