One of the most common problems new (and even old) managers face is what to do when their young promising warrior keeps losing. Understanding how to turn a warrior around is a skill that once acquired, will be invaluable.
One of the first things to understand is that warriors improve their abilities by learning skills and training stats. This means your opponents are improving, too. A warrior with lower wit is at an inherent disadvantage. Once you leave Noblish Island, 21 wit is a lot more common than you'd care to think about. That said, not every warrior has 21 wit, but the way things have progressed, most managers are highly focused on tourney success and in basic, that usually means 21 wit. So if you are a lower wit warrior (say 13 or less), your opponent likely has been learning faster than you have. But wit and skills are not the only thing that you need to win. Plenty of warriors with low wit are very successful. Even offensives can do very well with 11 wit (maybe even lower, but I don't recommend it).
Use your challenges and use your avoids. That alone will do much to improve your record. Looking at how you have won and lost will give you clear clues. Especially how you've won. These are the fights you want to replicate and avoid. Your warrior's strengths and weaknesses determine who you want to challenge and avoid.
Next, what you've been doing isn't working. Start to change things up. Even some offensives fight better when you start to lower the numbers. And hybrids and defensives can dramatically change their careers by altering the numbers just slightly, especially offensive effort. As to whether you want to increase or decrease numbers, there is no hard and fast rule. I will say that very low activity level is usually the first thing you want to remove on most warriors. Those super low activity levels aren't the best unless you are a scum or are facing a scum (scum being a total parry that tries only to wear you out). I've had numerous warrior magically start to fight better when I run on certain numbers, though.
Weapon selection is another key item. Weapons have different attributes. Changing weapons can help your warrior. Almost every weapon has circumstances where I'll use it. The only weapon I'll never use is the MS (but the bashing weapons in general are worse than the slashing and lunging weapons). Learn what weapons are good for what circumstances.
The last thing I'll mention in this article is optimizing a warrior. This is key for your losers. I started this article by hinting that all warriors are not equal. This is the only way you can make a truly inferior warrior win. Optimize him for a single way to win. Ignore all other fights and hope he faces someone that he can beat in his way to win. There will always be someone who can beat you, but if you try to make a loser win all his fights, you won't succeed. We publish many articles on what makes a good 'this type of warrior' articles in these newsletters. Choose the type that best matches your warriors strengths and optimize your strategy for that--then look for warriors that can lose to your strategy. And if all else fails, look for other losers to beat up!
This article assumes that you actually WANT to try and make your loser win. There is another, perfectly acceptable solution. The Dark Arena is your friend!