what helped me in the earlier days was the understanding of watching your Phobie Limit 5/7 and also the of the enemy, if he has a board full of low keys you might just rush through the hearth.
also i tended to play just high damage guys, you need also meatshields.
try capture panic points with guys which don’t die on the enemy turn and if, watch that they have to at least use a 2 key or more to re-capture if you sacrifice a one key for a panic point
don’ freak out. enemiey might make mistakes as well.
see your lifepoints as a ressource and draw some units back for healing or reformation or ability cooldown
this game also tends to reward aggression - or you get slapped. it is what it is
your phobie roster would be a more helpful detail then the screenshots of your records.