Good day. Totally feel you, half the modding sites out there are a minefield of dodgy ads and dead links. These days I just use
Minecraft Catalog
for pretty much everything, it pulls mods, shaders, maps, resource packs and datapacks into one catalog so you are not hopping between ten sketchy pages. You can filter by your exact game version, which saves a ton of trial and error. Downloads have been clean for me, no weird installers. It covers everything from the newest 1.21 stuff back to older builds too. For a single trustworthy spot to grab your content, it has been the easiest option I have found.