Is it a normal thing/common for bottoms to "finish" with porn ? Does it mean that you didn't perform well or your partner only wanted affirmation ?

Hello,

Im not sure if this is the right sub to post this or if my question is not well stated, its late night here and my thoughts are all over the place so don't mind me.

Here is the gist of it,

I [24] and my partner [29] have had our ups and downs over the past year. I found some suspicious things that made me doubt him, but he didn't give a clear or convincing explanation.

He has a weed addiction. He smoke way too much, and despite my attempts to help him stop, he only lowers his consumption for a day or two before getting back into it.

At the beginning, I used to think it was due to work-related stress, but I now think it's something more, and weed is probably not the only thing he is addicted to.

He doesn't put much effort into our intimate life, and I recently felt he only does it to satisfy me and found out that after we finish, he goes to masturbate to porn in the shower in secret. He seems to watch porn more often than I thought and without me knowing.

I always ask him if he got some kinks/fetish he wants to satisfy but he says nothing and doesn't like changing the position either.

I honestly don't think my performance is bad and im doing effort in this relationship so im wondering,

is it me or is it him or im overthinking it ?