It’s annoying but that’s how it always is. There’s a jump in competition right before every arena gate

I am at the same position, same king tower level as you with 3 max cards and tge other 5 cards between 12 and 13.

Personally I don't think they are camping, it's just that they're bad and just spam max level cards mindlessly but since I'm not maxed myself I usually get overwhelmed and lose.

Honestly I just gave up on going higher than 5500 for now. I'll just grind path of legends until I max another card and try again.

I've said this like twice before but matchmaking imbetween areanas is absolute garbage.

It always happened, but now its worse because you have ppl from higher arenas with skill stuck in lower ones because they have not the required KL.  

Applause supercell and your best update ever.

Is it just me or is “arena spawncamping” kinda an issue now