That is very doubtful. Both Electrum and the Zip Archiver use advanced encryption algorithms that are considered to be very secure. The biggest weakness in your setup is likely the password strength for both the Electrum wallet and the Zip archive. If you used weak or short passwords, those should be your primary focus for breaking the protection. But know that brute-forcing a password can take a lot of time and computer resources, depending on the password length and complexity. The more you remember about those passwords - length, any special characters, if you used any words or phrases, etc. - the better your chances. Every little detail helps, but there's no guarantee of success. 

In addition to what @ FatFork has said about  the weak password factor, it might also be possible that the encryption algorithms used as at that time are now outdated. If that is the case, then you still have a chance of recovering your password. Know that your Bitcoins are not lost yet, you just don't have access to them for now pending when you are able to recover your password. While you go about seeking for help on how to get access to your Bitcoins, beware of scammers. Goodluck

If you managed to bypass the zip password then you can recover your bitcoin in that wallet but if not then there's no chance you can recover your funds. You can try asking different people who can bypass the password in the zip file as the algorithm of the zip is good and it won't be easy to do it. Using brute force would be your best choice and you should find someone you can trust about the zip file and if the person did manage to do it then you should use different wallet by creating a new one.

I see it at least as an advantage that OP seems to have enough digital copies of his wallet and archives so that a loss of those files isn't likely. Some users don't even have backups at all!

The problem of course is, why on earth wasn't the encryption passwords or passphrases not backed up. I mention this not to rub salt in OP's wounds but to emphasize that you can't rely on your human memory and such details need to be properly backed up in analog and redundant fashion!

If you don't want to trust someone else, get familiar with JohnTheRipper and Hashcat and how to smart crack your ZIP archive's encryption password. The password cracking for fun community of those tools is quite helpful if you need assistance.

Btw, use those tools responsibly and in a secure environment. Don't expose valuable encrypted archives to unsecure daily internet shit devices! Verify the authenticity of those tools the same you should do with wallet software!

Now probability of success largely depends on the potential complexity of the password and what you remember of it. Was it random? Was it human created (many users aren't particularly creative with their passwords, they often re-use stuff or have some more or less good scheme with only minor variation in certain parts)?

Just doing dumb brute-force can only succeed if the encryption password was rather short. If you have no idea what your password could've been, well that's not a good starting point. Also, you could've forgotten that you actually have documented it. Are you sure you didn't write it down or any hints about it? Think about it: why wouldn't you write it down? Hm, because it was a password you thought you can't forget? Think harder: why wouldn't you forget that password? It was maybe something you used commonly? And so on...

It's possible to crack even long passwords, but only if you have some clues or knowledge of what building blocks your password was made of. This is where rule or pattern based password cracking can shine. But again, success rate and cracking time heavily depend on what you remember how your password could've been and of course how powerful the cracking gear is.


P.S.
If you try to crack it yourself, I highly recommend to verify if you're actually able to find a solution. What I mean is: prepare a model case with an encrypted ZIP archive where you know the encryption password (make it somewhat simple but not too simple); do all your cracking stuff as if you don't know the password but only have clues of it sufficiently to crack using brute-force or rule/pattern attacks.

You should be able to find the model case solution and crack the password. If you fail at the test sample, how are you supposed to succeed with the real deal?

No offense, but if you had just sat down with a pen and paper one day a week and tried to reconstruct the passwords you used at the time or the places where you saved them, you might have been a lot closer to the solution than you are now. Waiting for a vulnerability to appear in the programs you used is something you may never see.

If none of the advice in this topic works, maybe you can try something that comes out of the domain of technical experiments and is called hypnosis - with the help of such a procedure, some people can remember things that they have completely forgotten. Some will say I'm talking nonsense, but in your case you need to grab every straw that exists.