With the details you provide, probably a wallet linked to the account or any other thing that could prove that you really own the account could give you a chance of getting it back, or you don't want the old account again?
If you care about getting your hacked account back you should try checking out this link How to recover hacked account
My original account username was axel2078. I had been on the forum for years, finally becoming a full member and then one day when I tried to log in, I couldn't anymore and I noticed someone else was posting using my account. I sent a message to the mods right away, but they asked me to provide some kind of digital signing proof that the account was mine and I had no idea how to do that. I wish I could provide something to you that would prove that I was the original owner, but I don't know what that could be aside from the email address that it was opened with. Would I like to get my old account back? Sure, that would be great, but if it's not possible, I understand.
The profile axel2078 was engaging in general discussion of the forum from when they started making post in the forum which was on October 09, 2014, 02:56:04 PM to October 27, 2016, 02:33:15 AM then from July 09, 2017, 04:25:31 PM the profile changed hands and started making posts on alternate cryptocurrency discussions till when they made their last post on July 20, 2019, 07:11:55 PM and the account became inactive since July 24, 2019, 08:47:17 PM.
Going by these findings, if the account was really hijacked then it should be around when the profile changed hand in July 09, 2017, 04:25:31 PM so there is some truth in what you are saying but however, had it been you have staked a Bitcoin wallet address and you can be able to sign a message with it to back up your claims then it would have made an easy way for the account recovery process.
However, forum users can still consider signing their Bitcoin address attached to their account to this thread Stake your Bitcoin address here so that in a case of their account being hijacked or hacked they can have enough evidence to back up their claims.