I am so happy now with all the old paintings that I kept in my drawer instead of throwing them away, even though they were absolutely not ‘good enough’ according to my taste.
The fun thing is: paintings can lack composition, some parts can be dull or uninteresting. But if you tear or cut them apart, you can use the most exciting parts, with the best textures, the most beautiful colours, the most interesting line patterns. Then you take them and make a good (or at least better) composition with them.
So there is a good reason to never throw your old colorful paintings away, They can get a second life.