Auto-resolve is a strange feature. You could have 50 2nd tier troops v.s 15 top teir, and your 50 would die in auto-resolve. Every troop has a number affiliated with its rank and power (I think equipment, too), and these numbers are taken into consideration when Auto-Resolve is being used.
M&B Warband is difficult to adjust to at first, I remember first time I played it, I was utterly thrashed. Luckily though, I'd played original M&B beforehand so I knew a little bit. What difficulty settings are you on? If you're set to "normal damage", I suggest trying "easy" for those first few steps.
And, although I understand the frustration a game can bring (believe you me, don't I just), thousands of people have had no problems with the game whatsoever. You see problems posted on the forums, because that's what they were designed for. Give and take, give and take. I won't give you a lecture, it's not my place. We all have an opinion, but please, consider posting a bug report about your crashes before flaming the crap TaleWorlds and wishing them ill. They have a job to do, and my goodness they have been doing it. They actually listen to the customers, unlike some other larger scale companies.
Now you can throw the game out if that is your wish, but we all have to learn new things. It's a game, it's supposed to be fun blah blah, but if you aren't enjoying it, and (I mean no offense when I say this) aren't willing to learn for whatever reason -- and that's perfectly fine too up to a point, then, maybe it is best you don't play it, or take a break and try again later.