0.3.1 is a miss. Please read. Legitimate feedback

I've been a proponent of everything you guys have done since 0.1. I've accepted the bugs and misfires and constantly defended each move as improvement. And enjoyed every step on that path. Until now. I have a 90 mercenary, a 92 monk, and an 88 warrior. I've been playing the warrior as my latest and it's about to be 89. Every day I've been excited to get on and play it, see how high I can go. Until this patch. I made it to level 87 with less than 3 deaths (and only from stupid stuff) and never felt in danger like ever. I was building a great character and really had it down. I logged in after the patch and died in one shot to the very first deadly map boss I encountered. I tried the map again, without a deadly boss this time, and STILL died in one shot to the regular version. I beat him the next time. Then I did another map with a deadly map boss. And died in one shot to it again. I was more careful that time, danced around a bit and tried to whittle him down, but ultimately got caught and killed. I turned the game off and went to bed. This morning I tried again. Got to another deadly map boss, spent 10 minutes dancing around it and trying to kill it. Got it to 50% life before I finally succumbed. After 10 literal minutes! I'm all for added challenge. But this isn't it. This isn't fun. I've always been excited to keep pushing. But maybe it's just that warrior is too hard at that level? So I switched back to my 92 monk. Did a tower map with a deadly boss. And I did more damage for sure. But again, I died. With a character that had almost never died ever. Against the chimera which I know how to fight REALLY well. You can call it a skill issue. You can see git gud. Sure. But after that death I sat there looking at the screen trying to decide what to do next since I had a couple more hours of game time before I needed to leave. And for the first time, I just closed the game. I find myself not even interested in trying now. And again, I've never been a complainer. I've been one that told people that it was early release, it's improving, it's only going to get better as it goes. But this is not it.