Babyjacket complete frustration

I cannot believe it. The drops babyjacket is cursed - I tell you CURSED! The day that thing is truely finished something utterly horrible is going to happen - something so horrible that powers beyond my understanding have sought to delay the finish of the jacket using ubelievably simple but effective tricks.
First there was the gauge trick.
I was done. Almost completely done - only needed the buttonholerow, the neckrow and sewing on the buttons. And that would be it. I held up my work to admire my doing. 5 months of work. 5 MONTHS! For a babyjacket! Ok - I hadnt been working on it every day exactly - but ever so often I had pulled it from the back and knit a couple of centimeters. And now it was DONE - almost. But as I stopped to admire the final piece I realised that I had knit the entire right front on a way larger gauge than the other front. Truth was brutal and harsh and impossible to miss. I had to frog one six'th of my jacket and reknit it at a tighter gauge.
I ate that one - and the next day the frogging began.
And I knit it again.
Until it was done. Again. And then was the sleeve-trick.
Almost done but the finishing. I went on to seam the underarms. And weave in all the ends. And knit the neckline. And I held up my work to FINALLY admire the finished babyjacket. Knit in sockyarn on 2,5 mm needles. 5 months or work - and then some.
And I see it.
The sleeves.
OH NO - the sleeves. How could this happen? I have been SO CAREFUL. I have payed such attention to detail - and now this.
The sleeves are not equal in length. Not at all equal...
The right sleeve is about 5 cms longer than the left. That means one sleeve is about 15-20% longer than the other sleeve. And that is visible. Very visible..

I just wanna sit down and cry and never ever see the bloody thing before my eyes again.. I am so FED UP with this thing. I want it over and done with. But I cannot possibly put it down like this. One thing is certain. I am NOT frogging the whole darn thing to the sleeve. No way. That would mean frogging the neck - after picking out the bound off edge. Picking out the bound off right front edge, the buttonrowpart, the 18 cms of front and the 18 cms of sleeve. That would set me back about 2 months or more. No way!
Now I am toying with other ideas.
Could I cut off the longer sleeve somehow? And then pick up stitches around it?
Or frog the neckline and then snip the thread somewhere just where the sleeve ends, frog the sleeve and reknit it? - Am guessing that would take me another 1-2 weeks or so. Guess I could live with that if it cant be any different .. sigh..
If ever I get back to loving knitting after this thing - then I deem knitting to be more than just another shortlived obsession of mine..