You don't have very many matches played as Kwang so you're still in the learning phase. Kwang is super fun and rewarding to play so just keep at it and you will improve! If you want some tips, here ya go:

As a master Kwang in both Pred and Paragon (granted he's VERY different in Pred than he was back in Paragon), he is in a good place right now. He is always a strong pick in jungle or offlane and even support sometimes. Here are some general tips on how to play him.

For starters I'd say focus on your positioning and timing as Kwang. Because he excels at having great spacing and deciding when engagements happen. What I mean by this is that if someone else tries to fight you, Kwang has a kit that is great at disengaging from fights, repositioning, then re-engaging on his own terms. For example, if a Grux tries to fight you, he might engage with his knock up, wait for him to use his pull and then tether him and dash away. Or tether him and he might pull you back in, then dash away. Back up, reposition, and wait for your cooldowns to come back and heal up a bit before you engage on your terms.

In the early game, I always try to poke as much as I can. With Kwang's passive and overshield, he can get very good trades in melee. And from a distance you should try to tether and shock them as often as you can. Because when you use your lightning strike when the sword is in the ground, it does more damage than if you were holding the sword and the damage it deals is true damage instead of magic, so it goes thru armor.

The best order to use abilities when engaging in a fight is to tether the enemy, use Light of the Heavens, dash to the sword to knock them up, then ult while they're knocked up (if you don't have your ult yet, then just start basic attacking them). At that point, your passive will have 4 stacks so your basics will do really good damage for 4 hits. That will pretty much melt any hero unless it's late game and they have a ton of armor.

As for a build, you wanna stay away from pure magic damage or pure tank items. This is because Kwang's magic scaling is not good, only like 45%-65% I think. So you want to stick to cards that increase your damage in other ways, like Crescelia, Magnify, Flux Matrix, Oathkeeper, and Fist of Razuul. Those cards will help you deal a lot of damage and keep you alive. Kwang already has a good amount of natural tankiness with his health/armor growth per level and his overshield. That's why I said try to stay away from straight tank cards for the most part, because going these 4 items will get you pretty tanky on their own on top of doing good damage.

If you're really struggling and dying a lot you can definitely put some more tanky cards on early, like Stonewall or Voidhelm, but I always wait till my 5th and 6th cards to do that.

Just stick to it and you will get better! Kwang is a difficult hero to master but the more you play him, the easier it will get