Kimi wa Kanata felt like the very definition of mediocre. In all honesty it's not terrible it just feels like I've watched it before, like It's a Kimi no na wa wannabe.
Story starts off typical high school slice of life/romance, there is an accident and that's when the drugs kick in. I won't give away any spoilers, but at times I felt like I was watching a poor Spirited Away knock-off.
What is sad is that it could have been so much more. An interesting theme was dealt with in a superficial way. The FL character development lacked real depth. And ngl, the Disney trope of 'a song can fix anything' was super-cringe... you know, just sing away all your fears... which only works if you're 5.
The animation was fair, with quiet a few pretty moments. Overall this anime simply felt forgettable.