There’s something about messy 2010s mecha that isn’t nearly as endearing in most cases for me as messy 2000s mecha anime. I don’t know if that’s my age or if it was just a rough decade.
There was a lot of good mecha, especially in the genre renaissance that started around the end, it's just that the only ones anyone was watching were the bad ones.
I am a bit partial to Macross Delta but I also understand why it didn’t click with some folks like Frontier did