Alright listen up. I've read a lot of useless reviews about this game, and most of them contain misleading or just plain wrong information. I've played this game an insane amount (the number you see is only a fraction), so I feel like I should try to set the record straight.
If you have a mouse with adjustable DPI, put it as high as it will go. Put the in-game DPI at 100. If you still can't move around easily, buy a new mouse, because yours is horrible. You want a mouse with at least 800 DPI, which shouldn't be difficult to find. Pretty much any ♥♥♥♥ty wireless mouse now days has that.
I'm not going to give this game an across the board recommendation. It's full of perplexing design choices: Really hard at the beginning, need 2 mice to trade items between profiles, can't un-equip gems without editing the game files, gem farming is really tedious,(just edit them, it's not worth farming), can't manually select levels in the arena, runs at 50 fps (why?), need to play through multiple times to unlock every game mode and weapon, and the giant hud gets in the way a lot because the game is locked at 800x600.
That being said, POWER THROUGH THE FIRST LEVEL WITH THE flying insects. Yes, it's hard. It's hard because you suck. It gets easier after that, and even easier once you actually learn how to control your momentum and spacing properly. Controlling the flying thing while wielding a weapon is weird at first, but once you get the hang of it, it works incredibly well, and the game has a ridiculous amount of depth. I'm still learning new techniques after over 100 hours in.
As for miscellaneous stuff you should probably know: Once you put a gem on a weapon, you can't take it off. You have to edit the gem away. There are plenty of guides on how to do that. Blood rubies are essential for arena (the best part of the game by far), and they are very difficult to get. I'd recommend not farming them and just editing them onto your weapons once you finish the main story.
This is one of the most unique and most satisfying games I have ever played, but it takes some time to actually learn how to play well. Give it 4 or 5 hours. If you can tolerate it that long but still aren't having fun, give it until you start doing arena fights. If you still don't like it, then I guess it's not for you.