Of course not. His fans are loyal to him and so, therefore, he will still be here for a long time. That's the problem with people on the Internet these days. When a movie doesn't do well at the BO, people just exaggerate too much to point where they cross their limits just to spread negativity.
Now everyone is predicting that Salman will never give a Blockbuster in future as if they can see the future. He will give another BB for sure and when that happens people will eat their words.
Tubelight has received negative feedback but the fact is Salman is making an effort in terms of script. After the success of Bajrangi Bhaijaan, he realised that audience are demanding better content. This why he's gain so much confidence with the audience unlike SRK who has no clue what people want these days.