The thing is you expect alot of a manga if it's monthly, and series have proven this before:
Attack on Titan is a prime example of delivering good to great sometimes amazing content every month.
Blue Exorcist too.
Even Platinum End.
Noragami (which unfortunately is on hiatus at the moment get well soon Adachitoka sensei)
and Black Torch (that series is only 4 chapters deep and already things feel more interesting than the two chapters of new content has so far)
I might be missing a couple more mentions, but you get the point Boruto as a monthly manga pales in comparison significantly compared to the other series above it.
Don't forget Akame ga kiru though the manga has sadly ended it was awesome. Every monthly chapter left you wanting for more whenever you're reading it. Not to mention you would die from anxiety of who will be the next character to die.