The bottom cap was also completely destroyed. Supplier responded openly.
I have attached a RouterBOARD wAP G-5HacT2HnD by Mikrotik to the tip of my antenna mast to test it's strength. It's a big square antenna weightening 600g. I can safely say even in heavy winds the antenna mast holds together nicely. I will replace with a more streamline antenna soon so there is even less wind resistance. Great product.