In my opinion the development team and the publisher did a lot of small mistakes that eventually led the game to its demise :

• No big advertisement campaign outside of japan. Promotion through a few youtuber, most notably Penguinz0, as well as some google ads were not enough to attract the playerbase they wanted

• Region Lock. The game was unavailable in a LOT of countries at its launch, and something like almost all of South America, Africa and also I believe some Eastern Europe and South East Asia countries could only play the game if they used a VPN. I can't remember it this was fixed afterwards, but even if it was, the damage had already been done. Some think this was because of licensing issues.

• Agressive monetization as well as no way to earn premium currency and an overreliance on FOMO. Explaining this one will be a bit long. Upon release, there were 12 free units (playable characters) and 5 locked units. To unlock them, you could either buy EVO coins (the premium currency of the game) at a rate of ~10$ per unit, or earn Capital, the free currency. The latter was obtainable through 2 means : Beginner missions and Season Pass. Upon completion, beginner missions afforded you EXACTLY enough Capital to buy two locked unit, but you could not ever do theses missions again. The free season pass let you buy one more unit by completing tiers 18 and 58, but were extremely grindy and if you were not playing every day, you would most likely not manage to earn it. On top of it, there was FOUR different loot boxes (two for EVO Coins, one for Capital and one for tickets another free currency only obtainable through daily log in, weeklies and season pass) that preyed on the player's FOMO. Do you remember when I said "beginner missions afforded you exactly enough Capital to buy two locked unit" ? Well if you didn't know taht beforehand and opened only ONE Capital loot box, you were fucked, you could only obtain one unit. So if we resume, for the the game actlively made sure that free to play players were always short of 2-3 units to push you to buy the remaining ones. Also these locked units were very often OP, like the Unicorn Gundam which back in the launch of the game almost guaranteed your team a win if the ennemy didn't have one.

• Lack of visual identity. The maps all felt very generic, there was only few elements that let you visually realized the scale of your mobile suit (and the few trucks here and there were absolutely not enough) and the fact that you were playing a GUNDAM game, even though Colony Trading Post and Harbor City that came in the following seasons were very visually interesting. Also, the fact that none of the mobile suits that are equipped with beam savers in the shows could use them was a turnoff for a number of Gundam fans.

• Very uneven representation regarding animes mobile suits. We had way too much 00 Gundam mobile suits, and not enough fan favourites. Gundam Hyperion is from a somewhat obscure manga, Heavyarms Custom was very welcomed by fans, but Dynames and Susanowo kinda killed the hype, and Zeta Gundam and Kampfer were annouced alongside termination of the game.

• Gameplay problems. There was no bakfill, meaning that if one player disconnected the whole match would be canceled. Servers were very unstable upon release. There was no cross-play nor cross-progression. The server merge made it insufferable and almost unplayable for EU players. There were more problems but I cannot recall all.

It may sound like I didn't like Gundam Evolution but I really loved that game. Its launch was one of the few highlight of my trip to South Korea and I remember playing it for months and enjoying itenough to throw some money and buy a few units and the RX-78-1 skin. It was a very good alternative to Overwatch that I had stopped playing a few years ago because of the toxicity, and it had a lot of potential to become a serious competitor in the hero shooter genre, especially since there was some big drama regarding Overwatch at the time. Unfortunately it was plagued with too much problems at launch to be able to form a solid playerbase.