CS Conference paper reviews, decision and supervisor issue
Generally, it is a good idea to do what your supervisor says unless you really, really know what you're doing. In this case you have two supervisors who disagree. This is why people say that it's a good idea to avoid having co-supervisors. In any case, now you have them - the ideal solution is to get a unanimous decision from them. Maybe try to have a meeting with both present, or send an email to both, and ask for a clear decision on whether you should continue with the submission or withdraw it.

It's usually a bad idea to submit a paper that your supervisor is not on. In this case, one supervisor is on it, so it's kind of a grey area. But you say your supervisor is mad you submitted, that makes it not grey! It's hard to go far in science if you do things that make your supervisor mad.

Just because the reviewer had the same objections as your supervisor doesn't mean your supervisor influenced them. Maybe they independently recognized the same objective flaws. If you really want to get this published, I think your best option is to talk to the supportive co-supervisor, figure out how to deal with the problems, figure out how to best make a case to your unenthusiastic supervisor, then go to him and ask him to reconsider. If he won't reconsider, let it go. The benefit of the paper to you will not be more than the harm of annoying your supervisor.