This map is better suited for player-versus-player games.

I thought the same thing right away. Maybe we should move it to the section with maps for online games? As for the resources: perhaps they should be reduced, but, in my opinion, it is more important to make some paths impassable for thieves. Otherwise, the latter will have time to plunder a significant part of the map in the early stages of the game, collect those very sets of artifacts, and, again, gather significantly more resources than other players. Castles that do not have thieves at their disposal will find it difficult to counter this. However, I don't have much experience playing online, so I might be wrong.

I just can't figure out where the mountains are...

The coordinates of the green mountain are (146, 164). Here are some other oddities:

(50, 127) - flowering water lilies in a mountain river with snow-covered banks. Although, maybe they are magical?...

(196, 185) - a brown lava (or mud?) lake surrounded by small pools of bright orange color. It turns out that the temperature in the lake is lower than in the pools, although, logically, it should be the other way around. It's a small detail, but it immediately caught my eye.

(142, 271) - I don't know if this is a bug or a feature, but it looks like the texture of the coastal sand is randomly mixed with the texture of the water.

(232, 151) and (97, 135) - the water mill is not located along the river flow, but perpendicular to it, and, despite this, its wheel spins perfectly, drawing water from an unknown source. By the way, can I use this mind-blowing idea for something?

I also noticed a very sharp transition between the autumn and summer forest in the upper left part of the map. This is unlikely to occur in nature. However, there could be an explanation for this: someone decided to poison the mosquitoes in the swamp and overdid it with the chemicals. :D However, then not only the trees but also the grass should have turned yellow prematurely...