Hmm, see there is the problem. You made up your mind about Obama before he even started and decided he was a worthless president. Obama has changed a lot since the very beginning, but you're very blind to this because you've hated him from the beginning. When he first started he was very willing to work with everyone. If your eyes had been open and you had paid attention to anything other than FOX News you would have seen that. It's very, very obvious that his interest in going round and round with Republicans in his last four years has changed. He's a completely different person at this point.
The whole point of democracy is to work together, back and forth, to come up with an agreement that benefits as many people as possible. So let's say Obama says, "Let's open the borders to allow anyone and everyone to come in without question, what do you think?" The Republicans come back with, "No, we should actually kill every Mexican and Muslim in this country without question because they're all terrorists that are spreading measles and trying to force us into Sharia Law." Clearly, even you can see, that both sides are too extreme. The problem is that because Obama doesn't just say, "Okay, you're right, let's just kill all Mexicans and Muslims," suddenly he "is refusing to work with them. Instead he says, "Okay, well no, that's not going to work. How about we [do this instead]." Now he is a dictator that isn't working with Republicans. This has been happening the whole time he has been president and so yes, he has changed significantly because why keep screaming and battling and fighting with people who don't actually want to come to a neutral agreement? What the hell is the point anymore?