I wasn't happy with the way Bale treated us either, and I'm pretty ambivalent about his return TBH. But Bale did go to a bigger club and won trophies, and he didn't run down his contact, so we got a bloody good deal on his transfer.
The 'bigger' clubs didn't exactly fall over each other to sign Eriksen up, did they? He was so disengaged towards the end, it was criminal IMO.
I know that 99% of players don't feel the same about the Club as supporters do, and they will go where the money/glory is, but don't expect me to wish them well. I much prefer it when they fall flat on their face. That goes for the likes of Sheringham, Keane, Berbatov, Klinsmann, etc etc.