Yes, Bellatrix was Voldemort's most loyal follower and one of his strongest. Of course he would be upset over losing her. She was a valuable asset.

Voldemort is incapable of love (implied because he was conceived while his father was under the influence of a love potion). He and Bellatrix had Delphi because having a biological heir would be beneficial to him, and because of his obsession of being immortal, he possibly saw having his bloodline continue as a form of pseudo-immortality (many people actually see things this way). It's also possible that it was a reward of sorts for Bellatrix's loyalty.

Voldemort couldn't love due to his upbringing, not because of the love potion. It's a common misconceptio.n

No, I believe that Rowling said that his father being under a love potion contributed to it. It was originally just a fan-theory, but Rowing confirmed it. Voldemort is a sociopath because of his upbringing, but his inability to love or even understand love is a result of his conception while under a love potion.

Its bc of both things to me *shruggie*

Just disregard the cursed child and rest easy.

Goggle: "Strong emotional connection"

Voldemort: *Shove*

Can't disregard Cursed Child because Rowling said it's canon. So however you or anyone else feels about it, the creator of the series says it's legit.

You're wrong. Love potion didn't contribute. It was metaphorical. Proof:

"It was a symbolic way of showing that he came from a loveless union – but of course, everything would have changed if Merope had survived and raised him herself and loved him."

It's clear it wasn't the love potion. If so, it would go against the message in the books.

Can't disregard Cursed Child because Rowling said it's canon. So however you or anyone else feels about it, the creator of the series says it's legit.

Sure, the creator says it's legit. But the CC has so many plotholes and poor writing, that it just makes itself automatically non canon looking. The personalities of characters are way off and make no sense. It would make more sense if it was well written, with correct personalities

It doesn't really have any plot-holes, at least no more than the rest of the books. And the books takes place over a decade in the future, and are affected by time changing. Personalities change over time, and due to the past being changed.