I actually think you like the game at least a bit, else you wouldn’t take the time to register and take time to discuss the bugs (and perhaps figure, if they are really some or not ).
Yes, the classes aren’t easy to learn - specially once you arrive at the hardest, which is the mage… -, so perhaps not for everyone, yet as many others said, most spend couple 100 hours in. If I scroll through my library, with most of the games I was done in a fraction of that time, even all of them together would not match the orbus playtime; and that considered the price is also ok.
Now, since there is some of your weekend left : As a musketeer I think the right orb-routine is everything, for damage I’d recommend mainly poison at the beginning and perhaps frost orb, weakness isn’t really worth it imho.
I was also using the shield orb for leveling which blocks a ton of damage and keep up the renew HoT to heal me up; also you get talents later to make your turret even more powerful, should be fine to set it to dmg and only if you die often, to heal.
The Musk, if played correctly, does not really allow to die if you don’t get surprised by more than 1 mob; but likely you tried as a lvl 1 with no armor, so yes, getting your first 4 armor pieces - from drops when you kill something - is perhaps the hardest phase, but that should be done with in like an hour or less.
(And writing all this I feel like explaining things which apply to every mmorpg… there’s always a learning curve and people use outside sources to learn their classes and get most tips from others - in guilds -, as well, the fewest things are taught in the games itself).
As for so many MMORPGs the dungeon/endgame experience with groups is the best part (imo), perhaps even better than leveling. You will not arrive there in one weekend, likely, so yea it all takes time, but that is similar to lots of similar games in the genre.
(I wrote that in a hurry, edited typos out later )