What is the belt squat?
The belt squat is a variation of the squat in which the weight is anchored to the waist via a belt, rather than a standard loading method. This may be beneficial for some lifters as it removes the spine from the equation, and may enable you to put more loading on the legs/quads directly. However, I believe that this also has some drawbacks, and may not be a universal benefit.
I Just Don't Like The Reverse Nordic Curl
The reverse nordic curl and the nordic curl have become especially popular recently becaue of the ongoing COVID pandemic and the fact that these are bodyweight exercises that can be done at home. Both of these exercises are tough and can be especially hard on the knees. The best thing you can do is listen to your body! If you don’t like an exercise or if it doesn’t feel right, there are plenty of alternatives out there.