This game has a serious difficulty curve, sometimes you get stuck with an enemy next to you and you can't match to kill them
Yeah true. At first of course you can save these situations by matching tiles on the bottom of the board so that either you or the enemy gets repositioned. Of course this becomes an issue when you are on the bottom of the board (which should be avoided, even more so for corners). Teleport, voidwalker and other repositioning skills are a big help for surviving these.