I am really sorry for this accident you got and hope you will resolve it and come back.

Is the screenshot a message you got after upgrading your Electrum?

I searched and did not find any latest news or reports about Phishing attack on Electrum wallet. A past attack is in 2018 4 years ago. I am not so sure you got a same problem.
Electrum vulnerability allows arbitrary messages, phishing
Electrum Wallet Phishing Attack Nets Hackers $900K in Bitcoin


Does this attack come back?

My 2 cents.

It's not good to Escrow funds of different campaigns in 1 wallet. It happened already but I believe if you have multiple wallets with different seed, different passwords, you can have chance to protect one of two funds from Coinomize.biz and Yomix.

Because you store them all in one wallet, when shit happened, you lost all.