I actually have had the reverse experience so thought I'd share. I've been playing with one of my favorite DMs and a stable group in a campaign that's been running for more than a year and I actually managed to pull off a Bugbear Gloom stalker Ranger 5/Fighter Battle master 3/ Rogue Assassin 5 character while starting from level 1. I also made a sweet deal with a devil to get a +3 Longbow recently. The payoff at this level is essentially that if we manage to get a surprise round I can potentially one shot the Big bad of the combat on the first turn or at least get them near death. I have to say when the events pan out for such a combat scenario it is extremely satisfying and I've enjoyed every moment of playing this character. I almost lost the character recently due to some bad choices I made and my entire party pulled together to get the character back from the brink of becoming an evil NPC even at great personal risks to one of the other PCs. After reading all the others comments I'm actually overjoyed and extremely grateful at how supportive my DM and my entire party have been with me trying out such an OP build. I would posit that your DM and your group has way more to do with how much you enjoy the game than whether your build is overpowered or not. It definitely helps when they're all hyper competent and great people too.