Here are a few things that kinda pissed me off:
-Walt JUST SO HAPPENED to get hit with a bullet. If he didn't get hit, would he just get taken to jail to rot?
-What happened to Jesse?
-What happened to obviously the best character Heull?
-Did Marie become a crazy cat lady?
-What did Walt Jr. do with the cash?
-Did Walt Jr. ever call Saul?
-WHY DOES IT HAVE TO END
A few things you didn't notice: (I actually saw these somewhere on my phone but forgot the website)
-Walt left his watch at the gas station because he was out of time
-The robot was referenced by Jesse in S2E02 when he said "Are you going to build a robot to save me from the desert?"
-Jack and Hank died the same way
-Everytime Jesse held a gun to Walt, he said "Do it". Only this time did he ask for it.
-(this one is copied straight from the wiki when I looked it up because I didn't remember this one that great) "Felina" is also a combination of three periodic symbols: "Fe," "Li," and "Na." "Fe" is the symbol for iron, the dominant chemical in blood. "Li" is the symbol for lithium, the most common metal used in manufacturing methamphetamine, and "Na" is the symbol for sodium, a major element in human tears
-(This is the only thing I realized myself) Everytime Walt feels he is about to die, he looks at a distorted reflection of him self on something. (That paper towel container or something that he hit and looked into?)
-(This one I don't remember and don't know exactly what to look up to get the whole thing) There were 62 episodes in Breaking Bad, there was something with 62 (an element I'm pretty sure) which they use to treat cancer patients.