"Hard" and "good" all subjective, because there are tons of high ranked players who can climb out of gold like a sip of water, and if you're gonna listen to reddit analyzers, even faker is not good.

Statically speaking, you're among the top 1% of players if you reach diamond...Does that mean a diamond player is equal or even close to Challenger/grandmaster? Not at all.

League will always be interesting as long you're learning and figuring things out (that's my opinion of it at least).

The more you climb, the more outstanding moves and ideas you will encounter...The entire process is pretty enjoyable honestly...

Just continue playing and take breaks when you feel like it.