It seems to me(intuitively and from experience) that at lower stakes it's not really important to strive for balanced and unexploitable ranges, but rather play in such a manner that takes maximum advantage of other players bad leaks(unbalanced game). Now, of course, this would turn our own game into being exploitable, but most of the player at lower stakes seem to not be able to do anything about it...

So, which approach is better - try to maximally exploit others and thus opening our own game to being exploited or try to build balanced ranges (more of a GTO approach). 

I realize both have advantages and disadvantages, but for lower stakes at least, it really seems almost -EV and losing tons of value, if we try to play a GTO style, rather than exploiting others...