You guys might not beleive this, but I find Single Player more challenging now then multiplayer now.
PLaying an ffa unlocked teams in deplomacy, with all AI with Vicious mode, its a lot more challenging as for the first 2 hours, I been 4v1 while holding them off at two choke points. They are still dumb, for example they will try to kill your starbase with a fleet which cannot kill it, but within 1 hr, they were already prducing like 8 starbase destroyers and fleets which are not seen until 2hrs into a multiplayer game!
Holding off a 4v1 at 2 different chokes, it very challenging, instead of pning some noob, or cocky DT player. (Except for a few DT players who aint cocky) 
After 2hrs, I finally got a ceasefire going, and after 3hrs, I finally got most of the AI's in the game ceasefired to me. 
and guys, leave the smurfing issues in SMURFING THREADS, every thread I goto nowadays involves talking about smurfs. Its a problem we know, so leave it be, i hate hearing the same arguments over and over again. Sorry if i offend anyone, but its kinda getting pointless talking about it.