It's difficult to choose one between NIT Kurukshetra Civil and OEC Chandigarh CSE because both branches are different with diverse scopes and opportunities. You will have to consider a lot of parameters while choosing one of these

Personally I will suggest you opt for the CS branch unless you have any specific inclination towards civil engineering or any other branch. The excellent placements of this branch are not the only reason I am suggesting you go for it. The courses taught are rather easy and can be covered through self-study which may not be possible for Civil. 

You are aware of the academic situation of most engineering colleges these days. Most professors have no interest in teaching. I believe that if you can get CS in PEC you can also get CS in NIT Kurukshetra. It has a better alumni network so it's a better option than PEC. Civil students will have options like research internships, masters or Ph.D. later, get into IES, etc.

Here is a comparison of a few statistics that might help you further make a well-informed decision.

In the end, your choice of college won’t matter much but how you spent your 4 years will. 

Choosing COE at Thapar University over DTU Civil Engineering isn’t a mistake. Compared to Civil, COE has more career opportunities. Thapar University is a reputed private university and offers good placement opportunities for COE. Around 90% of students get placed from the branch. According to the highlights of Thapar University placements 2022, the average CTC for COE is around INR 13 LPA. 

My suggestion would be to opt for IIT Hyderabad Civil Engineering and prepare for a branch change. 

IITs cannot be compared to any private college other than BITS. Even if you are unable to change your branch, don’t feel disheartened as the IIT Brand name is more than enough. 

I know many people who were part of the Chemical, Biotech, and Civil Engineering branches of IIT and are earning more than 12 LPA currently. Irrespective of the branch you belong to, IITs offer an excellent coding culture making you proficient in the same. The quality of peer groups you will be interacting with is also better at IITs than at private colleges like RVCE. 

All in all, IIT as a brand is better than RVCE and other private colleges except BITS.

I would never recommend you to go for any core branch at new IITs. With the new IIT tag, ISM Dhanbad is a far better option as it was established in 1926 and enjoys global recognition in contrast to IIT Hyderabad, which is still under development. Both the colleges are poles apart in terms of infrastructure, facilities, etc.

The table below shows a head-on comparison of the placement scenario at both the institutes:

Last year, my friend was in a similar dilemma and decided to seek help directly from a PhD student at IIT Indore. Surprisingly enough, the fellow's first question was if I had other options. 

He explained that the CE branch here is new and lacks credibility yet. The labs aren’t well established and the seniors are equally clueless about the future. This helped my friend a lot as he then switched to IIT Patna EE and to date, he hasn’t regretted his decision even once as it is one of the best UG branches of IIT Patna. 

• Choosing IIT Patna will give you a variety of options to opt for after 4 years in various fields like Core Electrical, Electronics, Coding, Open Source Development, Further Studies, and even Research.
• Being one of the oldest branches, it has a broad alumni pool that is making big contributions to society. 
• The branch has the best labs such as the Advanced Electrical Lab, the Basic/Analog/Digital Lab, the Communication Lab, the Digital Signal Processing Lab, and so on. 
• The branch has an actively operating Club called Sparkonics
• Like any other IIT, the professors are highly qualified and you cannot doubt their parity. 

Lastly, don’t give up on IIT Indore just because it is in Patna. Irrespective of whichever city it belongs to an IIT will serve you the best!