Hollow Knight is in my top 10 favourite games for sure. It's a game I have played many times over and even tried speedrunning. It's a game I bought several times because I wanted to play it on different platforms as well as to gift to others.
That being said, when gifting to others I quickly learned that it is not for everyone. I've gifted this game to 3 people and all 3 were unable to get into it. The one other person who I recommended it to ended up putting it on his top 10 list too.
I do remember that before I first played the game, I watched a review that did talk about the start of the game being a little slow, and that the game kicks in around 4 hours of gameplay so I guess I was 'prepared' but that being said, I don't recall ever feeling put off when playing it. There was a certain charm to the game that kept me intrigued as I kept playing. I loved the character art and the backgrounds, the sounds all the npc's make. how each place felt like it belonged in the game in it's own way and how deep the game felt from a lore perspective as you progressed.
The difficulty felt just right and beating some of the endgame bosses felt incredible. When you mastered a fight you really felt like you were on fire. It's just generally fun to replay bosses too. Comparing how I would have handled a fight prior to today, the difference in skill definitely shows and brings with it a good feeling.
I personally really liked the charms system too. I liked the rewards for exploring and how I got to experiment with my kit as I progressed. I feel like it was done well, without ever being unnecessarily over complicated or cumbersome.
I think out of all of this, the best sequence I got to enjoy was something called the Path of Pain, it's a hidden area towards the end of the game which many might miss entirely, and it offers you one of the best platforming sections ever crafted in a video game. This section alone would lead me to replaying the game 2 more times over.
I don't know what to tell you - I guess you either like it or you don't. I've always enjoyed metroidvania style games. so this really clicked with me. We live in what feels like the golden age of gaming so if this game doesn't feel like a hit for you, definitely try something else and don't feel bad about missing this one.
An alternative game to this which you might enjoy more, which also plays a bit like a metroidvania but provides you more direction would be 'Ori and the blind forest' and I strongly recommend that and it's sequel. They are also wonderful games! I think the main difference between Ori and Hollow Knight is that Hollow Knight doesn't hold your hand much so you can easily get lost exploring, whereas Ori feels like a story to play through with a direction to go in all the time, taking away the time you would spend feeling lost or confused.
Have a nice day OP!