Junk also tend to accumulate in rivers and lakes. Once it’s in there it’s out of sight, out of mind - and even if you know it’s there it is often difficult to remove.
When it finally gets cleaned up by bringing in the magnet or a barge to dredge it up or whatever, you’re seeing years if not decades of stuff that’s getting pulled out all at once.
Personally, I didn’t really mind Wesley in the later seasons and a few of the Wesley-centric episodes were pretty good. It’s really the first season, and even more so the first few episodes of the first season where he was annoying as all hell. Oh look, boy wonder saves the ship, yet again. Unfortunately that kind of seems to have stuck with the character, despite the show toning down his antics significantly after that.