Aside from the malware issue, which the new owners seem to have addressed, Sourceforge also had a confusing and unpleasant to use UI, especially for downloads.

Aside from the malware issue, which the new owners seem to have addressed, Sourceforge also had a confusing and unpleasant to use UI, especially for downloads. Optics matter - people make decisions based on their feelings about a site. (They seem to have improved that too, although the site is still quite cluttery even with an adblocker).