Indeed, having spent 4 years at a VC where we all took part in initial filtering of decks, the typical reasons decks failed to even make it to our investment committee, were:
* Not describing the team, or not having a team, or thinking you could outsource key functions (e.g. we once rejected a "tech company" where the entire tech function including the CTO were outsourced to a consultancy with no link to the founders)
* Not clearly explaining the idea.
* Not setting out the size of the opportunity clearly.
* Not setting out unit economics.
* Not setting out a long enough plan (some might want 5, we wanted 10) that sets out an optimistic but possible case to a huge exit. If you go to an angel, they might be ok with a case for a 10m acquihire, but for a VC putting in $5m+, you better have a path towards a $100m+/year revenue business even if it's a long shot. It doesn't matter if the opportunity is huge if you plan to take a conservative approach that will hardly get you any of it.
Is there a service for people like me who are much better at that than other things?
I guess that's Product Hunt or something. But it seems even with that it's fairly marketing and networking focused.
I.e. there is diminishing returns on a "perfect" pitch deck. You just want to be in the category of not sucking and the decks level of perfection is no longer important.
Today I would even go as long as to say the pitch deck is much less important than a demo.
You can in theory pitch in an email, the rest is just to make everyone feel good about giving and receiving the money.