I didn't suggest a series needed to be made. I just think it would have flowed better if they broke into 4 mini episodes. A lot of it felt too rushed.
And personally, I didn't really think we needed to see Jesse's story to have a conclusion. I thought it had enough conclusion when he finally broke free, drove off, and let out a cry/scream of relieve. It was kinda fitting and awesome end for him. Of him finally being free. Literally, of not just be held captive, but free from Walt, the life, that literally left him nothing.
It was awesome conclusion, and we really didn't need to know what happens next. We could make a few easy conclusions, but I just didn't really think it mattered to actually 'see it'.
Some of the flashback scenes with him and Todd, didn't really tell us anything we didn't know already. Sure, we got to see more of the extent it took on Jesse, but we kinda got to see a glimpse of that in the series as well. It expanded on it, but it didn't really tell us anything we didn't figure out. Being locked up, in concrete cell, well, would be pretty fucking shitty.
And we already saw Todd trying to bond with Jesse in the series, and it was just kinda weird in the movie. I thought some of it was good, but a lot of it was just filler too.