I loved Card Hunter at the start, but I'm really growing to hate it. It just kept getting harder and has stopped being any fun for me. I'm level 13 now and every encounter is now a massive gruelling challenge. I not looking to be constantly challenged by the game, it is exhausting and I have a job which provides more than enough challenge in my life. Neither do I wish to make the game simpler for those who are enjoying the difficulty. I am glad there are those who are enjoying it, but I just wanted a fun little tactical game where you're making decisions based on the cards you've drawn, and you're not going to lose just because you don't have all the right cards. If lower level adventures actually provided some experience then it would at least be possible to grind to a higher level to give myself an advantage, but all the levels that provide experience are just too much work for me to enjoy.
Which adventure are you having problems with and what's your party build like ? You can show your party build by: Hit F1 to open the console. You can hit F1 a second time to see full history. Type either "partybbcode" or "partyanddecksbbcode" (without quotes) and hit enter. The first one will get your entire active item list into the clipboard. The second will get the item list and all the cards that come from them. Then paste into a forum post.
It's definitely hard to cater for everyone, but just throw you problems at us and we're happy to sort you out
From the general feel of this post, I am guessing a few pointers on items and builds would go a long way to making the game easier for the OP. We would need some details though so we can give better advice.
I would note that level doesn't really matter so much as gear, so grinding lower instances will actually make you stronger. That said, it is an intentionally tough game and the levels around 14 are arguably the toughest. Peoples' tips and your own practice will help.