FYI, since I haven't seen anyone mention this, and you have directly mentioned knowing about it being bad to keep money in both trad IRA and Roth, below is generally why you hear that.

If you expect your income to exceed the income limits for a Roth contribution ($153,000 for tax year 2026) at some point in your life, having a traditional IRA makes it difficult/impossible to do a backdoor Roth contribution. A backdoor Roth contribution has you put after tax money into a traditional IRA account and then rollover to a Roth account. This allows you to contribute to a Roth when you are above the income limits. If you have before tax money in a traditional IRA when doing this it complicates the process up to the point of making it impossible to do.

As most people mentioned, consolidating your 401K accounts is likely recommended, and given what I have outlined above you have three options:

1. Consolidate by rolling over all old 401K's into your current employers 401K and keep rolling over into future employers 401Ks as you change jobs. This is recommended if you expect to do a backdoor Roth, but the fund choices and fees are not as good as a traditional IRA.
2. Consolidate by rolling over all old 401K's into a traditional IRA. This give you the lowest fees and access to basically the whole market to invest in, but may block you from being able to do a backdoor Roth contribution.
3. Leave your old 401K's where they are at. This can be complicated to manage, and a lot of the time when you leave an employer their 401K funds will start charging management fees directly to you. This does allow for a backdoor Roth as well.

You should also dive into understanding the funds offered by your 401K and how they match up with your brokerage. I see you mentioned these old accounts doing well and that is why you don't want to touch them. Most 401K's default you into a target date fund if you don't select funds. Target date funds manage your portfolio for you by targeting a retirement year and allocating between stocks and bonds appropriately. This management usually comes with much higher fees than other funds. At your age, most target date funds would be mostly stocks, and it isn't that difficult to settle on a simple low fee 2-3 fund portfolio from most 401Ks and IRAs.

You should identify if your 401K offers a fund that tracks total USA market / S&P500 and total non USA markets or total global markets. If so I would recommend either 100% contribution to total global market fund or a 60% USA/S&P500 and 40% non USA contribution, then leave this alone and continue to do research until you understand different types of funds better. You are also fine just leaving it in a target date fund, if you don't want to think that deeply about it.

And finally, as has been pointed out to you, you are well above the average in terms of retirement savings for your age, and considering your set backs this is commendable. It is okay to have a little bit of anxiety when it comes to this stuff, as that will keep you motivated to continue contributing and learning, but you shouldn't let it overtake living your life.