Limited input data, but my sense is that this could have nothing much to do with age. You've been talking to people who say plain out illegal things in interviews (at least in the USA), and it sounds like you've been looking for jobs through "commodity" channels -- asking for "interview projects" to be done in two weeks, hiring for experience with very specific tech, and so on.
Recommendation: don't do that. Instead aim to get a job with people who value inherent capabilities and flexibility, and who aren't abusers. To do that you may need to do some work first. For example, develop a web application of your own, open source, using some modern tech stack (doesn't matter which specific one). Then, when you interview you can talk about your experiences, thoughts, etc with that tech. This shows the interviewer that you have the capability to pick up new tech, to understand its strengths and weaknesses, to produce output. A good interviewer will see that and know that you will therefore be able to pick up whatever tech they want you to use. It's not about specific knowledge and buzzwords : it's about the ability to learn and apply. You can now go into interviews with the approach : I don't know anything about some of the tech you're using, but that's ok because I have proven I can learn, and I know a huge amount about _something_, and perhaps the interviewer will be interested to learn from me about that.
One of the advantages of age is that you have had more time to meet more people, with with more people, build a network. Use those contacts to look for jobs rather than recruiters.
Recommendation: don't do that. Instead aim to get a job with people who value inherent capabilities and flexibility, and who aren't abusers. To do that you may need to do some work first. For example, develop a web application of your own, open source, using some modern tech stack (doesn't matter which specific one). Then, when you interview you can talk about your experiences, thoughts, etc with that tech. This shows the interviewer that you have the capability to pick up new tech, to understand its strengths and weaknesses, to produce output. A good interviewer will see that and know that you will therefore be able to pick up whatever tech they want you to use. It's not about specific knowledge and buzzwords : it's about the ability to learn and apply. You can now go into interviews with the approach : I don't know anything about some of the tech you're using, but that's ok because I have proven I can learn, and I know a huge amount about _something_, and perhaps the interviewer will be interested to learn from me about that.
One of the advantages of age is that you have had more time to meet more people, with with more people, build a network. Use those contacts to look for jobs rather than recruiters.