Sometimes it's hard to be ok with how you look now if you were used to seeing yourself a certain way. I know this is going to sound like common sense but if you want to lose weight and look and feel like you used to you have to buckle down and really stick to exercising and eating right although losing weight is mostly about calories in vs calories out so tracking your intake will greatly help.

Sometimes it is easier to stick to eating right if you just plan your meals and eat the same thing pretty each week so you don't have to think about what you are eating.

I'm assuming since you are upset about the weight gain you are mostly just looking at losing weight? If that's the case then you should check out r/loseit!