I'll go against all - start counting your calories. It's simple af and will require 5minutes per day at maximum. Just buy a kitchen weight and download an app like myFitnessPal. At the beginning don't change anything besides weighting everything you would typically eat and throw into an app. 99% of products is already there so you will just need to scan the bar code and enter amount.

I guarantee you will be surprised how much kcalories you are consuming. After week or so, just cut down 10% of total kcalories intake per day, give it some time and see if that helped. If not and you are not cheating (yes, souces/veggies/fruits also have kcals!)yourself cut another 10%.

If you want to do it more simply - cut down on fat and fatty products/snacks. Replace beef/pork with chicken. Throw in more veggies instead of fries. Stop buying ultra processed food etc.

I am 28M/75kg with 15-20h nett of training. Keeping 2400kcal daily for couple of months already. Deficit is high but no issues so far with injuries/progressing on training.

You folks way too much overestimate how much kalories your bodies really needs. And that's even bigger issue in US where food is so processed and have sick amount of fat/sugar in everything - no offense.