The problem is that they just don't have anything to "sell" apart from themselves.
Nobody is going to throw mega dollars at them just for being Harry and Meghan.
But they have wasted opportunities as well and their high turnover of staff and advisers indicate that they are unwilling to listen to professional advice. Plus their own actions aptly demonstrate this.
When they do support initiatives they just appear shallow, vacuous and hypocritical. All the "be kind" etc is so far removed from their own actions towards both of their families that it makes whatever they say as nonsense since they don't practice what they preach.
They don't come across as people with charisma and empathy. Unfortunately, everything Meghan does just comes across as promoting Meghan.
They are also trying to live a life on a par with the A list movers and shakers that is both expensive and shallow as they haven't actually done anything to be worthy of such an accolade. Others in that sphere have achieved their success due to their talents whatever they may be.
They also do appear increasingly so to want different things out of live. Meghan huge star status and Harry who knows anymore.