Mariupol is on the border. It also took them from February 24th to May 20th, I don't know how you could argue 3 months as easy. They had to surround the city and shell it continuously. The first landmark to fall, the airport, took them a month to take. The first surrender didn't happen until April 4th. and some Ukrainian soldiers were able to break out of the city as late as April 11th.
And since when was Azob the best? They were never NATO trained. The best, subjective AF, Ukrainian unit that I can find reference to at Mauripol is the 36th Marines, and only one battalion of that Brigade were present, about 1000 men.
I am seeing Russia claiming to have killed 4k, and captured 6k more. The largest number I am seeing of Ukrainian defenders was 14k. I am seeing the Russians top out at 30k, but not all were engaged in the direct fighting, as they were shooting civilians trying to flee, I mean maintaining the siege.
again, I am finding your statements of "fact" impossible to back up even from Russian sources. The Ukrainian/western sources were saying just over 10k defenders fighting 45k Russians.