Are the placements in NIT Trichy getting worse compared to the previous years?

Whether the placements are improving or getting worse depends on the branch you are referring to. In the case of CSE, placements can be seen improving every year due to increasing demand in the market whereas placements of other core branches are deteriorating every year. However, this scenario is similar not only in the case of NIT Trichy but even in other IITs. 

Students of core branches either

• Pursue MBA or MTech after BTech to get placed better in the core sector
• Start learning coding skills and sit for average IT companies 

So, it’s better to sum for a better branch rather than blaming the institute. Some might deceive you into believing that the tag of the college matters more than anything. But in reality, it all depends on the branch you choose. Sometimes the JEE coaching centers promote IITs to a large extent that people tend to go for an under-average branch just for the IIT tag. I warn you against this as your career depends on your branch. 

Generalizing the issue, if you happen to have a choice between lower branches at top engineering colleges like new IITs, NITs and higher branches in tier-1 colleges like BITS, CEG, and NSIT, I will say go for the latter.