The EEOC found IBM GUILTY of age discrimination: https://www.documentcloud.org/documents/7206573-2020-09-02-IBM-LOD-Amended-Final-1-003.html
There are many articles about this topic: https://www.dailymail.co.uk/news/article-10511913/IBM-execs-forced-older-staff-make-way-younger-staff.html
https://features.propublica.org/ibm/ibm-age-discrimination-american-workers/
https://www.nytimes.com/2022/02/12/business/economy/ibm-age-discrimination.html
Numerous other IBMers have filed lawsuits against IBM: https://www.theregister.com/2020/04/15/ibm_age_discrimination_lawsuit/
If you’re interested in filing a lawsuit, remember you cannot file a lawsuit if you sign for severance. Speak to an attorney first before you do anything. I recommend Wright & Greenhill in Austin who have worked on several high profile cases. (I DO NOT work for them): https://www.wrightgreenhill.com/