I fucked up my career

I completed education from tier 1 colleges (MBA and Engineering both from coveted IIM and IIT). After MBA, I joined Wall Street bank and life was really good. Was enjoying the perks of a MNC although the work was also excruciating but was an overall good experience. Left it for a startup (fast growth kida in me led this decision). Worked in the startup across multiple roles, learned a lot of new things. Tried staying away from office politics and earned a good name in the circle. But growth (read pay) was not that enticing and was not growing hence decided to leave. Was naive enough to quote this reason to business head and HR as well. Obviously it didn't go well with anyone. Joined startup2, changed cities and joined it. The role was similar, although my manager was an epitome of a toxic manager. Was doing good but he always was able to find some or the other mistake in my work. If he would not find any mistake then he would suggest some tangential hypothesis and then reprimand me for not thinking about it. Was so toxic that I didn't take leave when my wife was hospitalized and giving birth to our child. Tried doing everything possible but couldn't save the job and got laid off in the 1st lay off wave. Was shattered. Confidence was at rock bottom. Tried searching for roles. Luckily I got into startup3 who had remote work at that time. Although I joined the marketing team (which was not at all related to my previous work) thus creating a mess of my profile. Worked hard but in a "restructuring" exercise got laid off again. Within a year 2 lay offs with random work and no concrete direction in work. Now searching for roles but not able to find anything suitable as I was in non-core roles and in this difficult time everyone is looking for cheap resources with 1-3 yoe and not looking for 7+ yoe with generalist profile. Contemplating starting from zero in Marketing or learning coding/Data science so that can start my career again with right basics.