Warframe. After 5k hours and multiple accounts, I cannot recommend it whole heartedly.
And for a lot of people that one is not going to make sense. The game itself is not bad or poorly made. My issues with that game are so small that for a majority of the players they will never experience the issues I've had. It's been a death of a thousand cuts, and unfortunately soulframe (the next thing they are making) has also left a bad taste after trying out. Each issue stems from the way in which the development team set about doing things (it's been 7 years, some people have moved on, they might have gotten better)