Yes, at least you have tried everything and if it works out that you leave and start aknew at least you can walk away knowing this and never feel any regets or remorese and that is good, nothing can be worse than to later on say to youself "if only I ould have done such and such, etc. . . "
See, now you'll be free of all that extra "mind baggage", and that my friend "is a good thing"
** hugs to you **