On the topic of sustainability it's probably warranted to call them "the beast". Fast fashion companies are a big part of the problem if you look up how much water and resources are needed to produce a single piece of clothing. Of course having cheap clothing is great for the consumer in the short-term the same way that flying short distance instead of taking the train is comfortable, or commuting with a car instead of public transport.
Their clothing recycling program falls under the definition of green washing. https://observer.com/2018/03/hm-sustainability-conscious-exc...