For the last ... well it's been months, the server is more down than up, logs choked full, unable to upload work, unable to get work, even completely unreachable. What used to be a solid and reliable project is now obviously so low a priority for the admins they might as well let the cleaner unplug the server to charge their phone!
Does this research simply not matter to anyone any more?!

The project is reportedly under DDOS attacks,
however, it is strange that the administrators will not move the project to some large company where I can rent servers that has no problem with filtering attacks

the university already has a good internet connection (1Gbps optics to the bone network) and resources to host a server.

hosting the current server with the same performance and traffic (for instance on Amazon) would cost about $5000 per year

The primary issue is a lack of human resources, with only one admin managing the server. A targeted attack can cause problems even for well-protected servers backed by an army of paid security technicians. This is just a small BOINC server, so the existing protections weren't as robust as those used by large companies running critical operations or businesses.

It doesn't mean that no one cares. You know, it's easier to complain than fix the problem... the admin is already working on it, it just might take more time.