Just on this a bit
It's frustrating when luck goes against us, but it's sometimes worth putting things into perspective.
In baseball a game normally lasts around 280 pitches, making it comparable to a T20. Baseball analysts often look at a 20-game stretch as a 'slump', because smaller sample sizes than that are considered as not much more significant than background noise.
I think we need to take a similar approach to Stumped, where we're playing mostly limited overs cricket and only 14 games in each format in the competitive leagues. We saw this with Zach Burger last season - his numbers were terrific overall and in the friendlies, but somehow in the league he was underwhelming. A lot of this could just be sample size issues.
The stats bear out that over a bowler's career, better skills and higher average BQ = better results. If you look at the end of season charts, the top performers are usually all guns. But yes, lots of wickets do fall to lower BQ balls. Part of this is a result of game design - lower BQ balls tend to be more on the stumps, BQ drops as the innings progress, which is also when weaker batters are in the middle and more aggressive strokes are played. Part of this is also just the nature of cricket - **** gets wickets. It's natural in our game to see batters hit long-hops and fulltosses to fielders, to play all over half volleys, to be strangled down leg. And a lot of times these wickets fall as a result of pressure being built by good bowling. The loose ball enticing a rare mistake. Now - does this happen disproportionately more in Stumped than IRL cricket? Who knows. How does one even begin to do that analysis. But I play/watch/umpire a lot of cricket and I can't say I'm surprised to see a spinner take a bag of wickets bowling filth after the seamers have done the hard yards.
But, more broadly, Stumped's just a game. It's never going to be a perfect simulation of cricket. Don't fret too much about the details
Your luck will turn. I've gone through this loop multiple times - losing games due to bad rolls of the RNG, but then pulling off fantastic wins out of nowhere. It's the charm of this game, unlike Battrick or FTP where results are boringly predictable.