First lesson - take anything written while under the influence of alcohol and save it to disk. Read it when sober and ask yourself "does this make me look good or stupid?".Fix it accordingly.
You could walk into my shop with a Phd. in CNC and you would not run it - at least not without proving that you could. Paid too much for the damn machine and I know you are not going to even offer to fix it in the event of a crash.
Your pond is getting smaller and smaller. If you want to swim in it, take the hints/suggestions and make a plan to address them all. You don't have to bother the boss with nagging questions - maybe just a got a minute type. Wanna bet he'll take 20?
Or even a "is there a special way you want me to do this?"
I had "my ways" all over the place with my/our cams. My guys came up with suggestions AFTER they showed me their proposed changes. They even found some ways to "do this" in ways I found clever and imaginative.
Example. aftermarket diametral tolerances of cam journals are 0.001 to 0.002. We hold 0.0005. On special order, we can hold 0.0003 (edit) and if we know the temp of your shop, hold the three in our shop which is kept cool in winter and meet spec in your 78 deg shop across town.
That takes care and knowledge of how to grind. NOBODY is gonna walk in and do that out of trade school. I can't even do it and I taught the kid who runs the grinder how to grind cams. He's earned my trust - hes' had his OOPS moments.
BTW, did you ask why you got canned? They owed you that. If not, maybe it was a fit not to be...
You've probably had enough well meaning criticism. HINT: let your note sit for a couple days and read it as if you did NOT write it, if you can. Did you like what you saw? If not, what would you do about it??? WOUld you want that guy working for you. TOugh love can be quite helpful and you won't find/get a lot of sympathy here.