Why do you think Keane and Berbatov flopped at their clubs?

if your too good or u think your too good for a club that didn't get european footy often, then you think u deserve better like playing for a club that was in the champions league, thats how it is in football and they took that risk which they failed, spurs have certainly moved on from them 2, keane doesn't even start for spurs which said it all