Security: Old Crypto

I'm rather disappointed with progress in crypto technology -- or rather the lack of progress -- and am looking for a turnkey solution. 

The other day I burned cycles attempting (and failing) to secure my personal files that are stored in Cloud.  There are several Cloud storage providers but none empower consumers to prevent snooping, at least not beyond internal "policies".  My thinking is to encrypt files up in Cloud because one, basic purpose of cryptography technology is to ensure privacy.  Well encryption/decryption technology is still not turnkey.  

A decade ago there were add-ons for PCs to make eMail secure, like PGP, since those technologies were by nature public, yet now we entrust more public resources with private data spread across multiple personal devices.  The exposure of private data to the public is growing but its not the time to become a recluse. We need a turnkey solution that enables crypto processes across all personal devices and public resources. 

I tried Boxcryptor and bumped into many hurdles to a seamless experience.  One hurdle was tracing a sluggish browsing experience back to Boxcryptor's Chrome extension.  The extension enables web access to any of the Cloud platforms -- but sucked up 30-40% processing time.  Disabling the extension dropped my CPU usage down to 2-3%.  So I'm open to alternatives.