Pros:
Variety of roles (open to unique play styles)
Beginner friendly
beautiful skins/art/visuals
game mechanics
itemization is quite balanced
watching pros are the best part of this game

Cons:
TOXIC community (racism, sexism, homophobia etc)
Unbalanced
Outdated client (prone to horrendous lags, bugs and overall an unenjoyable game experience
inflation of power systems (what I hate most about this game)
Greedy company
unbalanced matchmaking system ffs
Trolls/smurfs can repel new beginners from improving
awful reward system