You have a very poor understanding of the purpose of ads.
To lose support in battleground states?
If that's the case then team Hillary is doing a bang up job
Ads work best when the candidates are not so well known. Both Trump and Clinton are already very well-defined. I honestly don't quite understand why Clinton is spending so much on ads when it is so lopsided, but then again, they probably play a role in helping shape the race in some areas. Personally I think even more money in GOTV may be better in some states than excessive ad spending, but that's just me I suppose. If Clinton had
(even secretly) pushed for reform to felony disenfranchisement in 2014 (FL), she could have set the stage in 2016 with a huge surge of black voters in Florida, which makes a hell of a difference. There are many ways she could have helped herself with a little forethought, but alas, that was not to be.
No candidate can really expect to win/control an election on ads alone. That's just not how it works. Not with two candidates that are almost universally known and come with preexisting, hardened opinions. Just because she is outspending him bigly doesn't mean she is guaranteed a lead.