How many "you"s are there out there? Is this a space BigCo would bother with? Would the other "you"s trust your more/less than BigCo? Is your issue really that important or does it just annoy you?

In general, the only way to find out is to talk to everyone you can that you think is "you". Ask them if they care. Ask what they'd pay for a solution.

Email them and hope they build it. Solves your problem and saves you the effort.

If the issue exsits within the software of such a big player, don't bother investing time (e.g something built for Google Docs, or Stripe Analytics...). If it's in the wild and a BigCo could do something, try it.

How aligned is it with the BigCo’s biz model? There are several examples of a product from a small startup being far more popular than BigCo’s simply because it’s too small a pie for them and therefore the execution is lacking.

I used to be worried earlier about ‘what if google does it’ for every idea of mine. I don’t think anyone needs to worry unless their idea is a feature enhancement for ads or search (taking google as an example).