Ganon's Dash Attack is TOO GODLY of a move to be used for just kills. I know it sounds oxymoronic given that Ganon is the worst character, but Ganon's Dash Attack is a very godly move. For Ganon, as a character who lacks better ways of creating openings legitimately, Ganon's Dash Attack is a move that in most matchups, you're inevitably going to be using it a lot. It's disappointing it's not safe on block like Samus's though (or given to another character lol).
Ganon's move usage varies a fair bit from matchup to matchup, but generally speaking, Ganon is forced to use his U-air, DA, and one or more of his other strong aerials as damage dealers. If Ganon's aerials were always safe to use for zoning and spacing, this wouldn't be too much of a problem, but at any rate Ganon is generally forced to use his best KO moves as damage dealers, since his best KO moves simultaneously happen to be among his only moves that are even somewhat viable for consistent damage dealing.
I always feel like matches where I land lots of grabs are ones where I have the advantage. It may not look like much, but the extra damage that Ganon misses out from poor grab range is a real reason why Ganon has a huge stale moves problem.
The other matches which I feel are good for me are the ones where I can land F-smash, just because Ganon's F-smash is in fact powerful enough to sorta bypass the stale moves problem that Ganon normally has. It's not even particularly hard to land, just you need the right setup.