You don't want to be doing low carb with tren so if carbs were the issue, you should be fine. Not that anything is ever simple or straight forward with tren. At 300mg you could start seeing some of those nasty side effects.
Great job on the meal prep. Sounds delicious. Sometimes it gets boring eating the same things so making great meals like that is key. Really helps with consistency.
That is definitely the classic stack for bulking. I would actually switch up the doses and run the test at 300mg and the deca at 500mg. Or even go down to 400mg on the deca. That will help keep sides down. Just make sure you are running an AI from day 1 and your diet is very clean.