It sucks to put a lot into a game and not get much back out. I had a bit of an addiction to World of Tanks at one point. I don't know how many hours- too many!- but I sank a lot of money in through microtransactions. I'm not sure exactly how much; over a grand, certainly, maybe closer to two. I still have a bunch of in game currency, unless they time bar you after not playing it for a while.
I gave up in the end.
It was an exercise in frustration. The player base were toxic, hacks and cheats abounded, seal clubbers rule the lower ranks in pimped out murderwagons, more experienced players jealously guard their win rate by fair means or foul, trolls work over supposed friendlies with monotonous regularity...

it was horrendous, just horrendous.
I'm sorry ED didn't work out for you. I've spent and continue to spend quite large amounts on my rig, which really means on Elite, because I hardly play anything else these days. I like to think I'd recognise the signs if I ever burn out and stop enjoying the game, but with my history who knows? Maybe I'll be Mr Five Hundred Hours at some point...
Not to rain on the parade, but ED was playable from D-day, SC still isn't, in spite of all that focus and budget. I wish the team all the best, I really hope they deliver that 'Eve in cockpits' experience so many people seem to want, but I've been reading fanbois preaching about how great it's
going to be since '14! They'll be right at some point, but I suspect it won't be this year...