I've heard a lot of woeful and problematic speeches over the years.
My own wedding being one occasion - my (you won't be surprised to hear, now ex)H gave a long and rambling speech where he droned on, and on, about his marvellous mother (she was a toxic weapon of a woman) and how much he loved her. He did also appropriately thank my parents, bridesmaids, etc, all the required acknowledgments. I suddenly realised he was getting to the end and hadn't mentioned me - at all. Not a word. I panickily muttered as much to my DM, who then gesticulated at me and mouthed my name, whereupon my new husband said, disarmingly, how much he loved me. For the rest of the day people were saying, aw how cute. But I couldn't believe he had said nothing about us, meeting, our relationship, why he loved me, while spending many many minutes eulogising his bloody mother.
This was an indication of things to come, unfortunately as he turned out to be a very abusive arsehole - the thing was, at that point in our lives, he did adore me, but it lacked any practical meaning, like in that scenario, where he just didn't plan his speech or give any thought to it, so that without realising he just gabbled on about his mother and forgot his wife. On his wedding day.
The BM who I liked generally, and was funny, made a good speech in some respects but also never mentioned me, and spent the whole speech completely slagging off my H. I mean, I get that's part of it but there wasn't one single nice thing included in the speech.
Other notable recollections, included a groom getting very tearful (his DF was dying) during his speech and his new wife standing up, saying sharply to him, sit DOWN, Thomas, and grabbing the microphone out of his hand; a FOB saying 'we all wondered if Linda was ever getting married' (they had been together 14 years, happily, she was dying to be married, he thought she didn't care about getting married and so never asked and she spent YEARS hoping, and refusing to talk to him about it), then 'sure, lookit, if it doesn't work out, we have divorce here now' (Ireland), and another where the BM was so drunk, he got half way through the speech - badly - before he fell over, stocious drunk. Drink has a lot to answer for in many of these situations.