This is a short-term fix. Eventually you will need to get up and clear it out manually again. Either you will end up with a large mass over the whole thing or s

This is a short-term fix. Eventually you will need to get up and clear it out manually again. Either you will end up with a large mass over the whole thing or smaller debris will continue to get through the chicken wire and eventually create a clog. The water will either pool a different way or you will be redirecting water to some other area it is not wanted. Regular, manual maintenance will be the only way apart from refactoring the building. This might just push the problem to other areas of the system which also don't scale. You could also invert the gutter. Rather than be a tube that can clog, use open materials that guide debris to where you'd like it, but are designed to release debris along the path should it start to collect. Something like a rain chain or spiral for downspouts. Shallow, wide channels could direct water to the edges and then overhang could help "pour" the water to the downspout.