How long have you given the setup? I aim for 5 sessions which ends up about 10 hours before I’ll give up and move on. Recently I did that with a deck only to have a great 6th session and rekindle it. I changed my wheel size when I first got it from 50 to just under 54, which threw me off at first.
Your Magenta is a standard BBS generic shape and likely has very average dimensions. Those shapes aren’t flat but aren’t too steep, not long but not short, not full but not Baker tapered, etc.
I skated Venture Highs on 14” and never liked it. Pop felt too heavy for how small the board was and never got my timing right. I liked Thunders and Indy forged on those dimensions much more. I actually really liked Venture on a Quasi 8.25 with a 14.25 and most WB in that vicinity, but on 14.38 they felt a bit hefty.
It kinda sucks to have gone through that many hours tweaking but you accept this when you enter madness.