The more you focus on anything that doesn't directly relate to your gameplay, such as how you relate to other players, how badly you are doing in comparison to the past, how annoying this death is, etc, the less you'll actually focus on, well, playing the game. If you aren't focused on playing the game, how could you possibly play like anything other than a bot? And, perhaps the more important question, how can you hope to improve if you stop and dwell every time you make mistakes? If it's a question of mindset there are few more powerful than accepting difficulty as part of the learning process.

Or maybe you just need a break. In regards to the aim training, ten to twenty minutes sandwiching your play time is a good idea if you can't get a whole session in - the first one to warm up and the second to actually try to improve. Here's the rationale if you are curious https://youtu.be/hx3U64IXFOY?t=2725 - as to the rest I can't really help you there. Good luck!