My second concern is doing an accurate marginal analysis. The most popular EA charities pretend like they constantly cannot get enough money to fully fund their expenditures. This isn't really true. If you look at the dollar amounts involved, the richest GiveWell donors could easily fund all of the need for, say, malaria nets. Instead, the most promising charities are kept "in need" in order to encourage other people to donate, and money that could go to the most popular causes is routed to more controversial things like US politics or AI safety. A marginal dollar given to malaria nets isn't really causing the funding of malaria nets to go up, it's enabling richer, more connected donors to change their allocations.
At the same time I do think that the principles behind EA make sense. Altruism should be effective. I just don't think the EA groups are executing on this promise. Unfortunately I don't have a great answer. The best strategy I can come with is to look for charitable opportunities of smaller scope, essentially cases where there is a "market failure". I'm not sure if this would be scalable though. If anyone has good ideas about how to do this whole thing better then I would be interested to chat because I do think it would be great to have an "EA that works".
In my opinion, which I think is somewhat EA compatible, just give money to poor people. Directly to them, in as much as possible, avoiding corrupt intermediaries that might steal it. Send money straight to their phones if that's the main form of 'banking' they use.
The other, in my opinion, very effective form of assisting poor countries is allowing labour movement from them. I'm from Romania, allowing rural workers access to Western Europe's labour market was the biggest poverty uplift in the history of our country. This has the welfare downside of harming the labour power of poor/working class people in Western Europe. Not sure any Western European country has handled that part of the equation correctly, any maybe there is no great solution. But it definitely worked for us immigrants.