One of the things that's too often overlooked is that subtractions might do more to help than additions. If you're taking a host of vitamins, herbal remedies, and strange supplements and still feeling like shit, it's likely because all the medicine in the world won't heal if you're still taking poison.
Not to be that person, but I am fully convinced that eating animal products plays a decisive role in depression and other mood disorders. Not only is there science pointing in that direction, but it matches my own personal experience as well as what every other plant-based person I've known has experienced as well. Before the switch I was so far in a constant background noise of depression that I was ambivalent about whether I wanted to live or not.
I've tried a lot of things, with only ever small or temporary results at best. Going plant-based, within weeks of staying consistent with it, marked the first time in my life when I actually began to actively want to live (even in spite of our capitalist hellscape). That desire to live has endured since then to the point that it's tempting to say I might be cured of depression.
https://nutritionfacts.org/video/anti-inflammatory-diet-for-depression/
https://nutritionfacts.org/video/how-to-boost-brain-bdnf-levels-for-depression-treatment/
I don't blame you for not knowing any better, there's a lot of persistent myths and outright lies about veganism, plant-based lifestyles, and nutrition. But you are spreading misinformation again, about protein. Our society's obsession with protein has little to do with science, and a lot to do with marketing. In the first place the vast majority of people do not need nearly as much protein as they think they do. It's so easy to get adequate protein even on a plant-based diet, that as long as you're at least mostly eating real food and getting enough calories, you are getting enough protein without even having to worry about it.
Even the whole "plants don't have complete proteins" is a myth. Just about all plants have all essential amino acids. What the protein combining myth points to is that the amino acid ratios in plants are a little bit different than the ratios in our muscle tissues, with some plants being low in a key amino, and other plants being high in that amino but also low in another. Getting what we need is as easy as being sure to eat a variety of plants. A person does not even need to make sure they're eating rice and beans in the same meal - they could do just as well by either eating a larger helping of one or the other, and/or eating one and then the other at another time or day.
The big takeaway here is to consider that maybe your perspective on plant-based lifestyles is being informed in the same way as if someone who only ever ran Windows started trying to tell you what it's like to use Linux. Maybe it's worth checking out the perspectives of people who actually have experience with the thing and know what they're talking about.
https://m.youtube.com/watch?v=DMwf_9wqWY0&pp=ygUqZXZlcnl0aGluZyB5b3Uga25vdyBhYm91dCBwcm90ZWluIGlzIHdyb25n
I understand that everyone has different circumstances that make a plant-based transition easier or harder, or maybe even entirely unfeasible, and that's okay. We're okay as long as we're doing what we can with what we have.
On the other hand consider trying to shift your perspective on it. I commented in another thread about the remarkable benefits of going plant-based for my depression, and the thing to understand here is that going plant-based can have near-miraculous benefits for a wide range of things like that. So consider the possibility that a lot of what might be making it hard to switch is that the consumption of animal products is keeping everyone in suppressed, unmotivated, lethargic, or even outright depressed states of mind.
It's a bit of a chicken and egg problem, but instead of seeing a plant-based transition as a burden, consider that working through the challenges might be just the medicine that a person needs to reach a state of mind where, say, things like home cooking begin to feel possible again.
Again I want to be clear - I know there are circumstances where it's not realistically possible for a person to go fully vegan, and not realistically possible for a person to do their own cooking. We should be seeking ways to fix that on a societal level. However what I'm telling you is that what everyone thinks is possible is being perceived through the lens of lifestyles that are making everything that much harder - working through that tough transition to being fully plant-based expands the range of what we think is possible. Life becomes significantly more doable on plants.
Oh, and for both health and ethics there is no meaningful difference between which particular animals you choose to eat. For example you're still progressing heart disease regardless of whether you're consuming 29 grams of saturated fat, or "only" 23 grams. And a chicken is every bit as capable of contemplating their own suffering as a cow is.