Rewrite aside (which is kind of a second-rate chuuni game with Key heroines), stuff from Jun will generally be the exact same, not only the ending (which would be more acceptable). Hell, I don't even know if Jun wrote Rewrite, I'm just assuming he did.
That said, while I do dislike a lot of VNs, I hardly know who wrote them. Much rather remember the company who did it than it's individual writers.
Guess I just hate any moege work, no matter the writer and dislike most of the charage ones. That seems legit enough. My major complaint about VNs is generally "why should I care about person X anyway?" so character-oriented drama and romance tend to fail miserably.