I absolutely love the map. Just a few changes I would suggest.
The map is pretty much made to let Blu plow through. You need to give Red more of a fighting chance. Instead of making them spawn at the third point when defending the second point, let them spawn right there. There's already a spawn exit, so why not let them use it? As it stands, that area is practically impossible to defend until the cart gets to the choke point. Also, at the second point, there's two doors, yet rarely have I ever been spat out of the other. Make them both worthwhile. Same goes for the two doors at the first spawn; instead of making Blu hike all the way across the map to get to the cart, you should give them Red's initial spawn once they cap the first point, and have them go through the door that nobody ever uses. This way, there's much less walking, and much more fighting. Good for everyone.
There should be more side routes, too. Aside from that one nook at the first point, the back entrance at the shack by the third point, and the upper route at the final point, it's entirely straightforward. While I like the nook at the first point, you should make it accessible for both teams, not just attack pouring in. The back route on the third point is practically pointless; offense has no need since it'll hardly help them sneak around and their next spawn is right next to it anyway, and defense has no use since any kind of sentries or stickies you try to put up there won't be able to touch the enemy until after they've capped. Either build that route to go somewhere else, or erase it entirely. As for the upper walkway at the final point, that should not be two-way. The final point is difficult to defend as is; you don't need to make it even easier for the attacking team by giving them easy access to the high ground. They only need that one walkway to get to the upper platform; don't give them that shortcut to immediately cut off any kind of sentry or dispenser support the defending team may have up there. Also, the doorway leading up there from Red spawn should be one-way. There's no reason for anyone to have to go down that walkway, since they could just jump off the ledge. If you're going to make it two-way, then just delete the door altogether, since it's completely unnecessary in that case.
Last but certainly not least, is the final point. Good god, the respawn for it is monstrously long. Once offense caps the third point, the match is practically over, since in the 25 seconds it takes Red to get out of their spawn, Blu has already pushed the cart all the way. Plus, there's apparently two spawn points for Red, yet not once have I ever come out of the spawn on the other side. Make the spawn times much, MUCH shorter, and let Red come out of either of those spawns.
I certainly don't hate this map; these are blemishes that stain what could be an absolutely perfect map. If you make these tweaks, then I don't think anyone could ever have any kind of issue with it.
tl;dr, my main points were
-Make more spawn points, less spawn times, so that there's less waiting and walking and more fighting.
-Don't make it so easy for Blu.
-Don't make it so difficult for Red.
-Fix that last point so that Red has a fighting chance.
I pray that you make these changes, and that I can look forward to the map being even better.