Your sentence is perfect. It's a way of saying the problem exists AND will continue while the neglect continues.

It's fine. I don't feel more is required. I might be tempted to The issue occurs through ... It's a little strange to make the issue general and not past, as if recurring, yet refer to "the event" which sounds very specific, rather than for example the general "events". Harsh words. This level of criticism would be terminal to careers in some places. :) See what other answers you get. :)

Yes, this does sound good. There is only one issue unrelated to the main point of your question. Instead of "delegating amateurs to handle the event", I would say "delegating the handling of the event to amateurs". The reason I would do this is because we say "delegate (something) (to someone)".