It costs time and effort, something that disabled people often have less of.
Voter fraud is extremely low in the UK, and most of what does occur isn't stopped by these changes (the most common type is, for example, parents submitting a postal vote on behalf of their (18+) children without asking them), So here's a question for you:
If the number of people disuaded from voting due to the new ID laws significantly outnumber* the amount of fraud that's prevented by this law, was the law a positive change?
*To the point that it has a larger effect on election outcome
As someone who had a partner with chronic depression for 8 years, it doesn't rule you out, but here's the thing: you can't go into a relationship expecting it (or your partner) to solve your depression. Depression is an illness, not just being sad, the thing that makes it depression is the fact that there isn't some external thing (or lack of thing) making you sad, so a relationship isn't going to add anything that would help.
I'm aware everyone's experience is subjective, but drawing from my experience, you should avoid codependency. It would be very easy to fall into a relationship where your partner and the relationship becomes your source of self-worth, and caring for you becomes their source of self worth. I say this as someone who made that mistake and in the end both of us ended up happier once the relationship was over, but it was a very difficult situation to get out of for both parties. In the end caring for a partner as a source of self worth results in low self esteem, because nothing you can do will cure their depression, and both parties just end up completely burnt out.
Finally, avoid something I know my partner would have done after creating and reading this post: please don't take the advice to not date as 'proof' that you're not worth dating, that's not true. Really the advice should say: don't look for self-worth in a relationship.