There's other larger dinghies to sail and dinghies will accelerate your learnings.
I know a guy about your size who loves his flying scot. There's larger lazers you can sail.
If you don't like it, then you don't like it. It's all about finding a boat you like. You can hate to sail dinghies but love to sail keel boats. But don't give up the potential education a dinghy boat can give over one boat.
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A ship in harbor is safe, but that's not why ships are built.
1974 Alcort Minifish-Minifish
2001 Drascombe Lugger-Penelope
2004 Hunter 260-Miss Muffet