Started my current job in February of this year, and immediately regretted it. I took it because it because it cut my commute by 2/3rds from the job I had before. It's smaller in scope than I was accustomed to, and frankly boring. Also am fairly underpaid.
Interviewed and was accepted for a position with a large international conglomerate with a 50% pay rise, and hybrid, etc. This was a couple weeks ago, but I won't be starting until the end of this month. (New HR decision, my new manager tried to move up that date, but was unsuccessful).
As one is wont to do, I have been mentally checking out since then, and lowered my effort. This was noticed by my current boss, who put me on report and asked me what was up. I told him that I had some major personal stuff going on in my life, but I won't let that affect my work anymore. I didn't want to say that I had a new job lined up because I was worried he'd can me right then and there, and I do need this month's income.
I'm now worried that if I do give a standard two week notice period, he'll just, again, can me right away. Losing the two weeks would kinda suck, but it wouldn't be too detrimental.
I'm not sure if I'll put this job on my resume in the future, regardless.