Just binged lost for the first time

I think lost is one of my favorite shows that I've ever watched. I truly loved it... until the last episode. I cannot believe how bad the ending sucked and left me feeling so let down, but like I said definitely one of my favorite shows until that last episode. I'm not even sure why but that ending sucked so bad for such an amazing show it just kind of feels like they gave up and just ended abruptly, I feel they could have done so much more. Am I alone on this?