No way you can repair it stronger, disassemble and see if you glue it back and then perhaps reinforce it or wrap it in a small thin bit of metal sheeting or just glue more plastic underneath it. It clearly isn't fit for purpose and perhaps the company has had many complaints and doesn't want the expense or replacing. I don't know how many have been sold it may be quite niche product. Over the years I've had quite a few products which have failed due to some small piece of plastic breaking off at the end and I have products that I treat with kid gloves because I can see the plastic will fail easily. The amount of remote controls I've seen without the battery cover because the securing clip broke off. It's like you get to replace the batteries 3 times and then the clip is gone. I always keep small strips of metal for that reason. I had to repair a similar clip to yours in the past and ended up using the lid of a sardine tin cut down and bent to reinforce it. I used superglue and it never failed again wasn't too pretty though.